Citazione Stile APA (7a Edizione)

Shephard, C., Shephard, K., & Martin, D. (2003). The twentieth century world: A world study after 1900 (Reprinted (twice).). Murray.

Citazione stile Chigago Style (17a edizione)

Shephard, Colin, Keith Shephard, e Dave Martin. The Twentieth Century World: A World Study After 1900. Reprinted (twice). London: Murray, 2003.

Citatione MLA (9a ed.)

Shephard, Colin, et al. The Twentieth Century World: A World Study After 1900. Reprinted (twice). Murray, 2003.