APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (8:e uppl.)

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

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