APA (7e ed.) Bronvermelding

Não informado. (1926). General contracting. Engineering and Contracting Publishing.

Chicago (17e ed.) Bronvermelding

Não informado. General Contracting. Chicago, Ill: Engineering and Contracting Publishing, 1926.

MLA (8e ed.) Bronvermelding

Não informado. General Contracting. Engineering and Contracting Publishing, 1926.

Let op: Deze citaties zijn niet altijd 100% accuraat.