Não informado. (1920). Contractors and engineers monthly. Buttenheim-Dix Publishing.
Style de citation Chicago (17e éd.)Não informado. Contractors and Engineers Monthly. New York: Buttenheim-Dix Publishing, 1920.
Style de citation MLA (8e éd.)Não informado. Contractors and Engineers Monthly. Buttenheim-Dix Publishing, 1920.
Attention : ces citations peuvent ne pas être correctes à 100%.