APA
Botkin D. B., Botkin D. B., . (1982). Environmental studies. Columbus: Charles E. Merrill Publishing Company.
Chicago
Botkin Daniel B, Botkin Daniel B, . 1982. Environmental studies. Columbus: Charles E. Merrill Publishing Company.
Harvard
Botkin D. B., Botkin D. B., . (1982). Environmental studies. Columbus: Charles E. Merrill Publishing Company.
MLA
Botkin Daniel B, Botkin Daniel B, . Environmental studies. Columbus: Charles E. Merrill Publishing Company. 1982.