APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Colton, Joel G. Twentieth Century. Amsterdam: Time-Life International, 1969.

MLA (8th ed.) Citation

Colton, Joel G. Twentieth Century. Time-Life International, 1969.

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