Cita APA (7a ed.)

Isaacson, E. (1964). The Middle Ages (1. publ., 23. impression.). Nelson.

Cita Chicago Style (17a ed.)

Isaacson, Elisabeth. The Middle Ages. 1. publ., 23. impression. London [u.a.]: Nelson, 1964.

Cita MLA (9a ed.)

Isaacson, Elisabeth. The Middle Ages. 1. publ., 23. impression. Nelson, 1964.