Cita APA (7a ed.)
Penning de Vries, F. W. (2001). Land degradation: Information needs and challenges to research.
Cita Chicago Style (17a ed.)
Penning de Vries, Frits W.T. Land Degradation: Information Needs and Challenges to Research. 2001.
Cita MLA (9a ed.)
Penning de Vries, Frits W.T. Land Degradation: Information Needs and Challenges to Research. 2001.
Precaución: Estas citas no son 100% exactas.