APA (7e ed.) Bronvermelding

Não informado. (1929). Heating and Ventilating. National Trade Journals.

Chicago (17e ed.) Bronvermelding

Não informado. Heating and Ventilating. New York: National Trade Journals, 1929.

MLA (8e ed.) Bronvermelding

Não informado. Heating and Ventilating. National Trade Journals, 1929.

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