أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
In fact there are many sources, some of them are:
Suppliers (by getting goods/services on extended credit)
Funded LC's
Term Loans from bank
Over drafts from bank
Factoring
Advancing
Encasement of LC/receivables
etc