How to join (ap invoice distributions all) AP table info with PO Table

Below is the SQL for AP->PO->SLA->GL for *R12*.
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select ph.segment1 po_number,
aps.vendor_name,
msi.segment1 item_number,
msi.description item_description,

'A/P PO Match' accrual_transaction,
'AP*' source,
(select organization_name
from apps.org_organization_definitions
where organization_id = pd.destination_organization_id)

org,
ai.invoice_num doc_number,
ai.invoice_date doc_date,
aid.invoice_line_number line,
pl.unit_meas_lookup_code uom,

aid.quantity_invoiced quantity,
aid.unit_price,
(nvl(xdl.unrounded_accounted_dr, 0) -
nvl(xdl.unrounded_accounted_cr, 0)) accounted_amount,
(nvl(xdl.unrounded_entered_cr, 0) - nvl(xdl.unrounded_entered_cr, 0)) entered_amount,
xal.currency_code
from apps.gl_je_headers gjh,
apps.gl_je_lines gjl,
apps.gl_import_references gir,
apps.xla_ae_lines xal,
apps.xla_ae_headers xah,
apps.xla_events xe,
apps.xla_event_types_tl xet,
apps.xla_event_classes_tl xect,
apps.xla_distribution_links xdl,
apps.ap_invoice_distributions_all aid,
apps.ap_invoices_all ai,
apps.po_headers_all ph,
apps.po_distributions_all pd,
apps.po_lines_all pl,
apps.ap_suppliers aps,
apps.mtl_system_items_b msi
where gjh.je_header_id = gjl.je_header_id
and gjh.je_header_id = gir.je_header_id
and gjl.je_header_id = gir.je_header_id
and gir.je_line_num = gjl.je_line_num
and gir.gl_sl_link_id = xal.gl_sl_link_id
and xal.ae_header_id = xah.ae_header_id
and xah.event_id = xe.event_id
and xe.event_type_code = xet.event_type_code
and xe.application_id = xet.application_id
and xet.language = userenv('LANG')
and xect.entity_code = xet.entity_code
and xect.event_class_code = xet.event_class_code
and xect.application_id = xe.application_id
and xect.language = userenv('LANG')
and xah.ae_header_id = xdl.ae_header_id
and xal.ae_line_num = xdl.ae_line_num
and xdl.source_distribution_type = 'AP_INV_DIST'
and xdl.source_distribution_id_num_1 = aid.invoice_distribution_id
and ai.invoice_id = aid.invoice_id
and aid.po_distribution_id = pd.po_distribution_id
and gjh.je_source = 'Payables'
and ph.po_header_id = pd.po_header_id
and pl.po_header_id = ph.po_header_id
and pd.po_line_id = pl.po_line_id
and pd.org_id = &org_id
and ph.org_id = &org_id
and ai.org_id = &org_id
and aid.org_id = &org_id
and gjl.code_combination_id = &ccid
and ph.vendor_id = aps.vendor_id
and msi.inventory_item_id = pl.item_id
and msi.organization_id = pd.destination_organization_id