Matuz, R., Harris, B., & Ross, L. (2009). The presidents fact book: The achievements, campaigns, events, triumphs, tragedies, and legacies of every president from George Washington to Barack Obama. Black Dog & Leventhal Publishers.
Lua i Stíl Chicago (17ú heag.)Matuz, Roger, Bill Harris, agus Laura Ross. The Presidents Fact Book: The Achievements, Campaigns, Events, Triumphs, Tragedies, and Legacies of Every President from George Washington to Barack Obama. New York: Black Dog & Leventhal Publishers, 2009.
Lua MLA (9ú heag.)Matuz, Roger, et al. The Presidents Fact Book: The Achievements, Campaigns, Events, Triumphs, Tragedies, and Legacies of Every President from George Washington to Barack Obama. Black Dog & Leventhal Publishers, 2009.
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