APA (7th ed.) Citation

Harcourt, F., & Robinson, F. (1979). Twentieth-Century world history: A select bibliography. Helm.

Chicago Style (17th ed.) Citation

Harcourt, Freda, and Francis Robinson. Twentieth-Century World History: A Select Bibliography. London [etc.]: Helm, 1979.

MLA (9th ed.) Citation

Harcourt, Freda, and Francis Robinson. Twentieth-Century World History: A Select Bibliography. Helm, 1979.