APA (7th ed.) Citation

Billington, R. A. (1991). America's frontier heritage (6. print.). Univ. of New Mexico Press.

Chicago Style (17th ed.) Citation

Billington, Ray A. America's Frontier Heritage. 6. print. Albuquerque: Univ. of New Mexico Press, 1991.

MLA (9th ed.) Citation

Billington, Ray A. America's Frontier Heritage. 6. print. Univ. of New Mexico Press, 1991.