APA (7th ed.) Citation

Ragatz, L. J. (1944). The literature of European imperialism, 1815-1939. P. Pearlman.

Chicago Style (17th ed.) Citation

Ragatz, Lowell J. The Literature of European Imperialism, 1815-1939. Washington: P. Pearlman, 1944.

MLA (9th ed.) Citation

Ragatz, Lowell J. The Literature of European Imperialism, 1815-1939. P. Pearlman, 1944.