(1967). Encyclopaedia Britannica. Volume 13th: Jirasek to lightouses. Chicago: Benton W..
Παραπομπή Chicago StyleEncyclopaedia Britannica. Volume 13th: Jirasek to Lightouses. Chicago: Benton W., 1967.
MLA CitationEncyclopaedia Britannica. Volume 13th: Jirasek to Lightouses. Chicago: Benton W., 1967.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.