Cita APA (7a ed.)

Dix, E., & Stephen, A. (1979). Commerce. Celtic Revision Aids.

Cita Chicago Style (17a ed.)

Dix, E., y A. Stephen. Commerce. Middlesex: Celtic Revision Aids, 1979.

Cita MLA (8a ed.)

Dix, E., y A. Stephen. Commerce. Celtic Revision Aids, 1979.