Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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