Não informado. (1921). Brazilian business. American Chamber of Commerce for Brazil.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Brazilian Business. Rio de Janeiro: American Chamber of Commerce for Brazil, 1921.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Brazilian Business. American Chamber of Commerce for Brazil, 1921.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.