APA (7e ed.) Bronvermelding

Helga, Greene, C., & Olkowski, W. (1975). The city peoples book of raising food. Rodale Press.

Chicago (17e ed.) Bronvermelding

Helga, Cathy Greene, en William Olkowski. The City Peoples Book of Raising Food. Pennsylvania: Rodale Press, 1975.

MLA (9e ed.) Bronvermelding

Helga, et al. The City Peoples Book of Raising Food. Rodale Press, 1975.