Cita APA (7a ed.)

Mitchner, E., & Tuffs, R. J. (1989). One world. Reidmore books.

Cita Chicago Style (17a ed.)

Mitchner, E.Alyn, y R. Joanne Tuffs. One World. Edmonton: Reidmore books, 1989.

Cita MLA (9a ed.)

Mitchner, E.Alyn, y R. Joanne Tuffs. One World. Reidmore books, 1989.