APA (7th ed.) Citation

Tilden, F. (1986). The national parks: The classic book on the national parks, national monuments, & historic sites (3. rev. ed.). Knopf.

Chicago Style (17th ed.) Citation

Tilden, Freeman. The National Parks: The Classic Book on the National Parks, National Monuments, & Historic Sites. 3. rev. ed. New York: Knopf, 1986.

MLA (9th ed.) Citation

Tilden, Freeman. The National Parks: The Classic Book on the National Parks, National Monuments, & Historic Sites. 3. rev. ed. Knopf, 1986.