APA

Smith R. L., . (1972). The ecology of man: an ecosystem approach. New York: Harper & Row.

Chicago

Smith Robert Leo, . 1972. The ecology of man: an ecosystem approach. New York: Harper & Row.

Harvard

Smith R. L., . (1972). The ecology of man: an ecosystem approach. New York: Harper & Row.

MLA

Smith Robert Leo, . The ecology of man: an ecosystem approach. New York: Harper & Row. 1972.