12 photographs [of] Glacier National Park [graphic].
MLA
12 Photographs [of] Glacier National Park [Graphic]. Glacier Park Co., 0AD. https://collections.library.yale.edu/catalog/2011483.
APA, 6th edition
12 photographs [of] Glacier National Park [graphic]. (0 C.E.). [Pictorial works, Photographic prints]. Glacier Park Co. https://collections.library.yale.edu/catalog/2011483.