APA (7th ed.) Citation

Mcelheny, T., & Lewicke, A. (2007). The habitable planet. Annenberg Learner.

Chicago Style (17th ed.) Citation

Mcelheny, Tobias, and Anna Lewicke. The Habitable Planet. District of Columbia: Annenberg Learner, 2007.

MLA (9th ed.) Citation

Mcelheny, Tobias, and Anna Lewicke. The Habitable Planet. Annenberg Learner, 2007.