Campbell, M. (1989). 1-2-3 a su alcance. Osbone: MacGraw-Hill.
Chicago Style (17th ed.) CitationCampbell, Mary. 1-2-3 a Su Alcance. Madrid: Osbone: MacGraw-Hill, 1989.
MLA (9th ed.) CitationCampbell, Mary. 1-2-3 a Su Alcance. Osbone: MacGraw-Hill, 1989.
Warning: These citations may not always be 100% accurate.