Callaghan, J. (1992). Costing for contracts. Directory of cocial change.
Chicago Style (17th ed.) CitationCallaghan, John. Costing for Contracts. London: Directory of cocial change, 1992.
MLA引文Callaghan, John. Costing for Contracts. Directory of cocial change, 1992.
警告:這些引文格式不一定是100%准確.