Cita APA (7th ed.)

Spohn, R. F., & Allen, R. (1977). Retailing. Reston Pub.

Cita Chicago (17th ed.)

Spohn, Robert F., i Robert Allen. Retailing. Reston, Va: Reston Pub, 1977.

Cita MLA (9th ed.)

Spohn, Robert F., i Robert Allen. Retailing. Reston Pub, 1977.