Cita APA (7a ed.)

Udvardy,Miklos D.F. (1982). A biogeographical classification system for terrestrial environments. California State University.

Cita Chicago Style (17a ed.)

Udvardy,Miklos D.F. A Biogeographical Classification System for Terrestrial Environments. California - EEUU: California State University, 1982.

Cita MLA (8a ed.)

Udvardy,Miklos D.F. A Biogeographical Classification System for Terrestrial Environments. California State University, 1982.