APA (7e ed.) Bronvermelding

Não informado. (1946). Bulletin. National Research Council, Highway Research Board.

Chicago (17e ed.) Bronvermelding

Não informado. Bulletin. Washington: National Research Council, Highway Research Board, 1946.

MLA (8e ed.) Bronvermelding

Não informado. Bulletin. National Research Council, Highway Research Board, 1946.

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