APA

Conkling E. C., . (1976). Man's economic environment. New York: McGRAW-HILL BOOK COMPANY.

Chicago

Conkling Edgar C, . 1976. Man's economic environment. New York: McGRAW-HILL BOOK COMPANY.

Harvard

Conkling E. C., . (1976). Man's economic environment. New York: McGRAW-HILL BOOK COMPANY.

MLA

Conkling Edgar C, . Man's economic environment. New York: McGRAW-HILL BOOK COMPANY. 1976.