Cita APA (7a ed.)
Hellin, J., & López Ridaura, S. (2016). Soil and water conservation on Central American hillsides: If more technologies is the answer, what is the question? American Institute of Mathematical Sciences.
Cita Chicago Style (17a ed.)
Hellin, Jonathan, y Santiago López Ridaura. Soil and Water Conservation on Central American Hillsides: If More Technologies Is the Answer, What Is the Question? American Institute of Mathematical Sciences, 2016.
Cita MLA (9a ed.)
Hellin, Jonathan, y Santiago López Ridaura. Soil and Water Conservation on Central American Hillsides: If More Technologies Is the Answer, What Is the Question? American Institute of Mathematical Sciences, 2016.
Precaución: Estas citas no son 100% exactas.