APA (7th ed.) Citation

Valkenburg, S. V. (1942). America at war: A geographical analysis. Prentice-Hall.

Chicago Style (17th ed.) Citation

Valkenburg, Samuel Van. America at War: A Geographical Analysis. New York: Prentice-Hall, 1942.

MLA (9th ed.) Citation

Valkenburg, Samuel Van. America at War: A Geographical Analysis. Prentice-Hall, 1942.