Gaya APA
Grolier, . (1985).
Encyclopedia Americana #21: Oporto to Photoengraving .
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Grolier International Inc.,.
Gaya MLA
Grolier, .
"Encyclopedia Americana #21: Oporto to Photoengraving".
America:
Grolier International Inc.,,
1985.
GEN - Bacaan/Seri Non-Fiksi.