Specifies which AP account the bill will be credited to. Many/most small businesses have a single AP account, so the account is implied. When specified, the account must be a Liability account, and further, the sub-type must be of type "Payables" [b]QuickBooks Notes[/b][br /] The AP Account should always be specified or a default will be used.

public ReferenceType APAccountRef { get; set; }