APA (7th ed.) Citation

Colton, J. (1969). Twentieth century. Time-Life Books.

Chicago Style (17th ed.) Citation

Colton, Joel. Twentieth Century. [Amsterdam]: Time-Life Books, 1969.

MLA (9th ed.) Citation

Colton, Joel. Twentieth Century. Time-Life Books, 1969.

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