APA

Martin P. Y., O'Connor G. G., . (1989). The social environment: open systems applications. New York: Longman.

Chicago

Martin Patricia Yancey, O'Connor Gerald G, . 1989. The social environment: open systems applications. New York: Longman.

Harvard

Martin P. Y., O'Connor G. G., . (1989). The social environment: open systems applications. New York: Longman.

MLA

Martin Patricia Yancey, O'Connor Gerald G, . The social environment: open systems applications. New York: Longman. 1989.