APA (7th ed.) Citation

Granada Television International, Films for the Humanities (Firm), Harrison, E., & Foster, C. (2003). Valley glaciers. Films for the Humanities.

Chicago Style (17th ed.) Citation

Granada Television International, Films for the Humanities (Firm), Eric Harrison, and Charles Foster. Valley Glaciers. Princeton, N.J.: Films for the Humanities, 2003.

MLA (9th ed.) Citation

Granada Television International, et al. Valley Glaciers. Films for the Humanities, 2003.