APA (7e ed.) Bronvermelding

Christensen, C. R., & Learned, E. P. (1973). Business policy: Text and cases (3d ed.). National Book Store.

Chicago (17e ed.) Bronvermelding

Christensen, Carl Roland, en Edmund Philip Learned. Business Policy: Text and Cases. 3d ed. [Manila]: National Book Store, 1973.

MLA (9e ed.) Bronvermelding

Christensen, Carl Roland, en Edmund Philip Learned. Business Policy: Text and Cases. 3d ed. National Book Store, 1973.