APA (7th ed.) Citation

Yorkey, R. C., Barrutia, R., & Uhl Chamot, A. English for International communication. Teacher´s edition.

Chicago Style (17th ed.) Citation

Yorkey, Richard C., Richard Barrutia, and Anna Uhl Chamot. English for International Communication. Teacher´s Edition.

MLA (8th ed.) Citation

Yorkey, Richard C., et al. English for International Communication. Teacher´s Edition.