APA (7th ed.) Citation

Great Courses (Firm),$4dst, & Kanopy (Firm),$4dst. (2015). Mount Saint Helens, Lassen Volcanic, Rainier. The Great Courses.

Chicago Style (17th ed.) Citation

Great Courses (Firm),$4dst, and Kanopy (Firm),$4dst. Mount Saint Helens, Lassen Volcanic, Rainier. [San Francisco, California, USA]: The Great Courses, 2015.

MLA (9th ed.) Citation

Great Courses (Firm),$4dst, and Kanopy (Firm),$4dst. Mount Saint Helens, Lassen Volcanic, Rainier. The Great Courses, 2015.