Cita APA

Shelford, V. E. 1. (1963). The ecology of North America. University of Illinois Press.

Citación estilo Chicago

Shelford, Víctor E. 1877-. The Ecology of North America. Urbana: University of Illinois Press, 1963.

Cita MLA

Shelford, Víctor E. 1877-. The Ecology of North America. Urbana: University of Illinois Press, 1963.