APA (7th ed.) Citation

Roberts & Tucker. (2006). World War I: Encyclopedia. ABC-CLIO.

Chicago Style (17th ed.) Citation

Roberts and Tucker. World War I: Encyclopedia. Santa Barbara, Calif: ABC-CLIO, 2006.

MLA (8th ed.) Citation

Roberts and Tucker. World War I: Encyclopedia. ABC-CLIO, 2006.

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