Style de citation APA (7e éd.)

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

Style de citation Chicago (17e éd.)

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

Style de citation MLA (9e éd.)

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