Gaya APA

Soule, J, D., Piper, J, K. (1992). Farming in nature image : an ecological approach to agriculture . Thousand Oaks, California: ISLAND PRESS.

Gaya MLA

Soule, Judith, D.., Piper, Jon, K.. "Farming in nature image : an ecological approach to agriculture". Thousand Oaks, California: ISLAND PRESS, 1992. Text.