APA (7th ed.) Citation

Baldwin, P. (1999). The 365 most important events of the twentieth century. William Morrow and Company.

Chicago Style (17th ed.) Citation

Baldwin, Paul. The 365 Most Important Events of the Twentieth Century. New York: William Morrow and Company, 1999.

MLA (8th ed.) Citation

Baldwin, Paul. The 365 Most Important Events of the Twentieth Century. William Morrow and Company, 1999.