APA (7th ed.) Citation

Langer, W. L. (1956). European alliances and alignments: 1871 - 1890 (2. ed., with suppl. bibliogr., repr.). Knopf.

Chicago Style (17th ed.) Citation

Langer, William L. European Alliances and Alignments: 1871 - 1890. 2. ed., with suppl. bibliogr., repr. New York: Knopf, 1956.

MLA (9th ed.) Citation

Langer, William L. European Alliances and Alignments: 1871 - 1890. 2. ed., with suppl. bibliogr., repr. Knopf, 1956.