APA (7th ed.) Citation

Armstrong, R. H. (1995). Guide to the birds of Alaska (4th ed.). Alaska Northwest Books.

Chicago Style (17th ed.) Citation

Armstrong, Robert H. Guide to the Birds of Alaska. 4th ed. Anchorage: Alaska Northwest Books, 1995.

MLA (9th ed.) Citation

Armstrong, Robert H. Guide to the Birds of Alaska. 4th ed. Alaska Northwest Books, 1995.