APA (7th ed.) Citation

Herring, G. C. (1986). America's longest war: The United States and Vietnam, 1950-1975 (Second edition.). Knopf.

Chicago Style (17th ed.) Citation

Herring, George C. America's Longest War: The United States and Vietnam, 1950-1975. Second edition. New York: Knopf, 1986.

MLA (9th ed.) Citation

Herring, George C. America's Longest War: The United States and Vietnam, 1950-1975. Second edition. Knopf, 1986.