Cita APA

Orians, G. H. (1969). The Number of bird species in some tropical forests. [S.l.]: [s.n.].

Citación estilo Chicago

Orians, Gordon H. The Number of Bird Species in Some Tropical Forests. [S.l.]: [s.n.], 1969.

Cita MLA

Orians, Gordon H. The Number of Bird Species in Some Tropical Forests. [S.l.]: [s.n.], 1969.