Gaya APA

TIM, . (1985). Encyclopedia Americana: Oporto to Photoengraving, Volume 21 (Volume 21). USA: Americana : Grolier International.

Gaya MLA

TIM, . "Encyclopedia Americana: Oporto to Photoengraving, Volume 21". Volume 21 USA: Americana : Grolier International, 1985. Text.