APA (7th ed.) Citation

Melbo, I. R. (1950). Our country's National Parks (Mid-century ed.). Bobbs-Merrill.

Chicago Style (17th ed.) Citation

Melbo, Irving Robert. Our Country's National Parks. Mid-century ed. Indianapolis [u.a.]: Bobbs-Merrill, 1950.

MLA (9th ed.) Citation

Melbo, Irving Robert. Our Country's National Parks. Mid-century ed. Bobbs-Merrill, 1950.