Bahr, L. S., & Johnston, B. (1993). Collier's Encyclopedia: Lauren S. Bahr, ed. dir. ; Bernard Johnston, ed. in chief. Collier.
Lua i Stíl Chicago (17ú heag.)Bahr, Lauren S., agus Bernard Johnston. Collier's Encyclopedia: Lauren S. Bahr, Ed. Dir. ; Bernard Johnston, Ed. in Chief. New York ; Toronto ; Sydney: Collier, 1993.
Lua MLA (8ú heag.)Bahr, Lauren S., agus Bernard Johnston. Collier's Encyclopedia: Lauren S. Bahr, Ed. Dir. ; Bernard Johnston, Ed. in Chief. Collier, 1993.
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