APA (7e ed.) Bronvermelding

Não informado. (1957). American road builder. American Road Builders Association.

Chicago (17e ed.) Bronvermelding

Não informado. American Road Builder. Washington: American Road Builders Association, 1957.

MLA (8e ed.) Bronvermelding

Não informado. American Road Builder. American Road Builders Association, 1957.

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