Different types of source documents?
debit cards, credit cards , receipt,cash book, voucher
"Source documents" are the original documents that were generated concerning some issue, rather than documents that are derived or transcribed from other documents. Source documents would be things like census forms, letters, or invoices, and not genealogies or histories compiled from other books, or spreadsheets.
The three different types of water pollution are point-source pollution, nonpoint-source pollution and transboundary pollution. T point-source pollution comes from a single source. The nonpoint-source pollution comes from different sources. Transboundary pollution can affect the environment from many miles away.
Source documents are an essential part of recording entries. These documents are the backup for entries to ensure that the correct information has been input into the computer system. Examples of source documents are invoices that accounts payable would input into their accounting system to generate payment.