Cita APA

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

Citación estilo Chicago

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

Cita MLA

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