Cita APA (7a ed.)
Sayer, J. A. (2000). Forest protected areas: Time is running out.
Cita Chicago Style (17a ed.)
Sayer, Jeffrey A. Forest Protected Areas: Time Is Running Out. 2000.
Cita MLA (9a ed.)
Sayer, Jeffrey A. Forest Protected Areas: Time Is Running Out. 2000.
Precaución: Estas citas no son 100% exactas.