APA

Wilson Aubrey, . (1972). the marketing of professional services. London, New York: McGraw-Hill.

Chicago

Wilson Aubrey, . 1972. the marketing of professional services. London, New York: McGraw-Hill.

Harvard

Wilson Aubrey, . (1972). the marketing of professional services. London, New York: McGraw-Hill.

MLA

Wilson Aubrey, . the marketing of professional services. London, New York: McGraw-Hill. 1972.