Cita APA (7a ed.)
Kirkby, R. A., & Georges, K. (1987). Soil organic matter: A review of research results. International Center for Tropical Agriculture.
Cita Chicago Style (17a ed.)
Kirkby, Roger A., y K. Georges. Soil Organic Matter: A Review of Research Results. International Center for Tropical Agriculture, 1987.
Cita MLA (9a ed.)
Kirkby, Roger A., y K. Georges. Soil Organic Matter: A Review of Research Results. International Center for Tropical Agriculture, 1987.
Precaución: Estas citas no son 100% exactas.