Gaya APA

Barger, K, E. (). Bibliography and Brief History of Studies by the U S Geological Survey in Yellowstone National Park, Wyoming, Idaho and Montana : 1965-1986 . : U S Geological Survey.

Gaya MLA

Barger, Keith, E. "Bibliography and Brief History of Studies by the U S Geological Survey in Yellowstone National Park, Wyoming, Idaho and Montana : 1965-1986". : U S Geological Survey, . Text.