APA (7th ed.) Citation

Stromberg, R. N. (1980). Europe in the twentieth century. Prentice-Hall.

Chicago Style (17th ed.) Citation

Stromberg, Roland N. Europe in the Twentieth Century. Englewood Cliffs, N.J.: Prentice-Hall, 1980.

MLA (9th ed.) Citation

Stromberg, Roland N. Europe in the Twentieth Century. Prentice-Hall, 1980.