APA (7th ed.) Citation

Douglas, W. O. (1960). America Challenged. Princeton University Press.

Chicago Style (17th ed.) Citation

Douglas, William O. America Challenged. Princeton, N.J.: Princeton University Press, 1960.

MLA (8th ed.) Citation

Douglas, William O. America Challenged. Princeton University Press, 1960.

Warning: These citations may not always be 100% accurate.