APA (7th ed.) Citation

Langer, W. L. (1966). European Alliances and alignments, 1871 - 1890 (2. ed. with suppl. bibliogr.). Knopf.

Chicago Style (17th ed.) Citation

Langer, William L. European Alliances and Alignments, 1871 - 1890. 2. ed. with suppl. bibliogr. New York: Knopf, 1966.

MLA (9th ed.) Citation

Langer, William L. European Alliances and Alignments, 1871 - 1890. 2. ed. with suppl. bibliogr. Knopf, 1966.