Cita APA (7a ed.)

Derry, T. K., & Jarman, T. L. (1977). The European world, 1870-1975 (3rd ed.). G. Bell and Sons.

Cita Chicago Style (17a ed.)

Derry, T. K., y Thomas Leckie Jarman. The European World, 1870-1975. 3rd ed. London: G. Bell and Sons, 1977.

Cita MLA (9a ed.)

Derry, T. K., y Thomas Leckie Jarman. The European World, 1870-1975. 3rd ed. G. Bell and Sons, 1977.