Cita APA

Smith, G. H. n. 1., & Smith, G. H. n. 1. (1950). Conservation of natural resources. New York, New York: Willey.

Citación estilo Chicago

Smith, Guy Harold n. 1895, y Guy Harold n. 1895 Smith. Conservation of Natural Resources. New York, New York: Willey, 1950.

Cita MLA

Smith, Guy Harold n. 1895, y Guy Harold n. 1895 Smith. Conservation of Natural Resources. New York, New York: Willey, 1950.