Style de citation APA (7e éd.)

Nelson, S., & Keim, W. G. (1940). Price behavior and business policy. [publisher not identified].

Style de citation Chicago (17e éd.)

Nelson, Saul, et Walter G. Keim. Price Behavior and Business Policy. [Washington]: [publisher not identified], 1940.

Style de citation MLA (8e éd.)

Nelson, Saul, et Walter G. Keim. Price Behavior and Business Policy. [publisher not identified], 1940.