Cita APA (7a ed.)

Shephard, C., Shephard, K., & Martin, D. (2002). The twentieth century world: A world study after 1900 (1. publ., reprinted.). Murray.

Cita Chicago Style (17a ed.)

Shephard, Colin, Keith Shephard, y Dave Martin. The Twentieth Century World: A World Study After 1900. 1. publ., reprinted. London: Murray, 2002.

Cita MLA (9a ed.)

Shephard, Colin, et al. The Twentieth Century World: A World Study After 1900. 1. publ., reprinted. Murray, 2002.