Cita APA

Botkin, D. B. (1982). Environmental studies: The earth as a living planets. Ohio: Bell & Howell Co..

Citación estilo Chicago

Botkin, Daniel B. Environmental Studies: The Earth As a Living Planets. Ohio: Bell & Howell Co., 1982.

Cita MLA

Botkin, Daniel B. Environmental Studies: The Earth As a Living Planets. Ohio: Bell & Howell Co., 1982.