APA (7e ed.) Bronvermelding

Não informado. (1920). Contractors and engineers monthly. Buttenheim-Dix Publishing.

Chicago (17e ed.) Bronvermelding

Não informado. Contractors and Engineers Monthly. New York: Buttenheim-Dix Publishing, 1920.

MLA (8e ed.) Bronvermelding

Não informado. Contractors and Engineers Monthly. Buttenheim-Dix Publishing, 1920.

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