Cita APA (7th ed.)

Norton, D., & Norton, D. (1993). From 1700 to the present day. Cambridge Univ. Press.

Cita Chicago (17th ed.)

Norton, David, i David Norton. From 1700 to the Present Day. Cambridge [u.a.]: Cambridge Univ. Press, 1993.

Cita MLA (8th ed.)

Norton, David, i David Norton. From 1700 to the Present Day. Cambridge Univ. Press, 1993.