Franklin

MLA

Armstrong, Brian, et al. Glacier National Park. Widescreen. [United States]: National Geographic, 2010.

APA

Armstrong, B., Vecchio, S., Williams, L., & Biondo, C. (2010). Glacier National Park. Widescreen. [United States]: National Geographic.

Chicago

Armstrong, Brian., Salvatore Vecchio, Lenny Williams, and Chris Biondo. Glacier National Park. Widescreen. [United States]: National Geographic, 2010.