APA

Drury C., .Costing An Introduction : Teachers Manual. London: Chapman and Hall,1994: .

Chicago

Drury Colin, .Costing An Introduction : Teachers Manual. London: Chapman and Hall,1994: .

Harvard

Drury C., .Costing An Introduction : Teachers Manual. London: Chapman and Hall,1994: .

MLA

Drury Colin, .London: Chapman and Hall,1994: . .