A source document is the original records that contain the details that support the transition that will be entered in an accounting system and these includes the sales receipts, the checks, purchase orders, and invoices, and the statements of banks, and other payroll reports etc.
Explanation: If the child knows that a book is the one object and the child has just learned a new word, the child will associate the new word with the unfamiliar green onion as it is an object the child has never seen before.
