APA

Chiras D. D., . (1991). Environmental science. California: The Benjamin/Cummings Publishing Company.

Chicago

Chiras D D, . 1991. Environmental science. California: The Benjamin/Cummings Publishing Company.

Harvard

Chiras D. D., . (1991). Environmental science. California: The Benjamin/Cummings Publishing Company.

MLA

Chiras D D, . Environmental science. California: The Benjamin/Cummings Publishing Company. 1991.