Cita APA

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

Chicago Style (17th ed.) Citation

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

Cita MLA

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