Cita APA (7a ed.)

Porter, A. N., & Overy, R. (1994). European imperialism, 1860 - 1914. Macmillan.

Cita Chicago Style (17a ed.)

Porter, Andrew N., y Richard Overy. European Imperialism, 1860 - 1914. Basingstoke [u.a.]: Macmillan, 1994.

Cita MLA (9a ed.)

Porter, Andrew N., y Richard Overy. European Imperialism, 1860 - 1914. Macmillan, 1994.