Cita APA (7th ed.)

Campbell, M. (1989). 1-2-3 a su alcance. Osbone: MacGraw-Hill.

Cita Chicago (17th ed.)

Campbell, Mary. 1-2-3 a Su Alcance. Madrid: Osbone: MacGraw-Hill, 1989.

Cita MLA (9th ed.)

Campbell, Mary. 1-2-3 a Su Alcance. Osbone: MacGraw-Hill, 1989.