Padron:Cite Collier's
"article name needed". Collier's New Encyclopedia. 1921.{{cite ensiklopedya}}
: CS1 maint: date auto-translated (link)
Dokumentasyon sa padron [gumawa]
"article name needed". Collier's New Encyclopedia. 1921.{{cite ensiklopedya}}
: CS1 maint: date auto-translated (link)