Cita APA

Stewart, J., & Stewart, J. (1990). Soil quality in semiarid agriculture =: Qualite du sol en agriculture semi-aride. Saskatchewan Institute of Pedology.

Citación estilo Chicago

Stewart, John, y John Stewart. Soil Quality in Semiarid Agriculture =: Qualite Du Sol En Agriculture Semi-aride. Saskatchewan Institute of Pedology, 1990.

Cita MLA

Stewart, John, y John Stewart. Soil Quality in Semiarid Agriculture =: Qualite Du Sol En Agriculture Semi-aride. Saskatchewan Institute of Pedology, 1990.