APA (7th ed.) Citation

Melbo, I. R. (1973). Our country's national parks (Centennial ed.). Bobbs-Merrill.

Chicago Style (17th ed.) Citation

Melbo, Irving R. Our Country's National Parks. Centennial ed. Indianapolis: Bobbs-Merrill, 1973.

MLA (9th ed.) Citation

Melbo, Irving R. Our Country's National Parks. Centennial ed. Bobbs-Merrill, 1973.