Citazione Stile APA (7a Edizione)

Ilsøe, P., & Jonsen, O. (1968). World history in pictures (2. ed., revised a. enlarged.). Harrap.

Citazione stile Chigago Style (17a edizione)

Ilsøe, Peter, e Oluf Jonsen. World History in Pictures. 2. ed., revised a. enlarged. London [u.a.]: Harrap, 1968.

Citatione MLA (9a ed.)

Ilsøe, Peter, e Oluf Jonsen. World History in Pictures. 2. ed., revised a. enlarged. Harrap, 1968.