Cithakan:Cite Collier's
Reynolds, Francis J., èd. (1921). Collier's New Encyclopedia. New York: P. F. Collier & Son Company. {{cite encyclopedia}}: Missing or empty |title= (pitulung)
Reynolds, Francis J., èd. (1921). Collier's New Encyclopedia. New York: P. F. Collier & Son Company. {{cite encyclopedia}}: Missing or empty |title= (pitulung)
