Gaya APA

Herring, G, C. (1979). America's longest war : the United States and Vietnam 1950-1975 (2nd ed). New York: Alfred A. Knopf.

Gaya MLA

Herring, George, C.. "America's longest war : the United States and Vietnam 1950-1975". 2nd ed New York: Alfred A. Knopf, 1979. Text.