Cita APA

Smith, G. H. (1971). Conservation of natural resources (4. ed.). Ney York (EUA): John Wiley Sons.

Citación estilo Chicago

Smith, Guy Harold. Conservation of Natural Resources. 4. ed. Ney York (EUA): John Wiley Sons, 1971.

Cita MLA

Smith, Guy Harold. Conservation of Natural Resources. 4. ed. Ney York (EUA): John Wiley Sons, 1971.