Cita APA

Franklin, J. F. Natural areas: Needs, concepts, and criteria. [s.l.]: [s.e.].

Citación estilo Chicago

Franklin, Jerry F. Natural Areas: Needs, Concepts, and Criteria. [s.l.]: [s.e.].

Cita MLA

Franklin, Jerry F. Natural Areas: Needs, Concepts, and Criteria. [s.l.]: [s.e.].