APA (7e ed.) Bronvermelding

Não informado. (2012). Purdue Agricultures Magazine. Purdue University, College of Agriculture.

Chicago (17e ed.) Bronvermelding

Não informado. Purdue Agricultures Magazine. West Lafayette, Ind: Purdue University, College of Agriculture, 2012.

MLA (8e ed.) Bronvermelding

Não informado. Purdue Agricultures Magazine. Purdue University, College of Agriculture, 2012.

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