APA

American Management Association, . (1962). Guides to more effective purchasing, New York [1962]. New York: s.n.

Chicago

American Management Association, . 1962. Guides to more effective purchasing, New York [1962]. New York: s.n.

Harvard

American Management Association, . (1962). Guides to more effective purchasing, New York [1962]. New York: s.n.

MLA

American Management Association, . Guides to more effective purchasing, New York [1962]. New York: s.n. 1962.