APA (7th ed.) Citation

Baker, L., & Blass, L. (2017). 21st century communication 1: Listening, speaking, and critical thinking. National Geographic Learning.

Chicago Style (17th ed.) Citation

Baker, Lida, and Laurie Blass. 21st Century Communication 1: Listening, Speaking, and Critical Thinking. Boston: National Geographic Learning, 2017.

MLA (9th ed.) Citation

Baker, Lida, and Laurie Blass. 21st Century Communication 1: Listening, Speaking, and Critical Thinking. National Geographic Learning, 2017.