APA (7th ed.) Citation

(1994). National parks of Montana & Wyoming: A pictorial guidebook. Billings News Inc..

Chicago Style (17th ed.) Citation

National Parks of Montana & Wyoming: A Pictorial Guidebook. [Montana]: Billings News Inc., 1994.

MLA (9th ed.) Citation

National Parks of Montana & Wyoming: A Pictorial Guidebook. Billings News Inc., 1994.

Warning: These citations may not always be 100% accurate.