Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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