APA (7e ed.) Bronvermelding

Não informado. (1949). Progressive agriculture in Arizona. University of Arizona, College of Agriculture.

Chicago (17e ed.) Bronvermelding

Não informado. Progressive Agriculture in Arizona. Tucson, Ariz: University of Arizona, College of Agriculture, 1949.

MLA (8e ed.) Bronvermelding

Não informado. Progressive Agriculture in Arizona. University of Arizona, College of Agriculture, 1949.

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