Citazione Stile APA (7a Edizione)

Weigall, D., & Murphy, M. J. (1991). Modern history: (1815 to present day) ; course companion (A-Level, 4. ed., revised.). Letts.

Citazione stile Chigago Style (17a edizione)

Weigall, David, e Michael J. Murphy. Modern History: (1815 to Present Day) ; Course Companion. A-Level, 4. ed., revised. London [u.a.]: Letts, 1991.

Citatione MLA (9a ed.)

Weigall, David, e Michael J. Murphy. Modern History: (1815 to Present Day) ; Course Companion. A-Level, 4. ed., revised. Letts, 1991.