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 (8th ed.) CitationCallaghan, John. Costing for Contracts. Directory of cocial change, 1992.
Warning: These citations may not always be 100% accurate.