Παραπομπή APA

Strongberg, R. N. (1992). Europe in the Twentieth Century (Ed.3.).

Παραπομπή Chicago Style

Strongberg, Ronald N. Europe in the Twentieth Century. Ed.3. New Jersey, Prentice Hall, 1992.

Παραπομπή MLA

Strongberg, Ronald N. Europe in the Twentieth Century. Ed.3. 1992.