Calmon, P., & Spence Robertson, W. (1940). América Colonial, Portuguesa e Inglesa. Jackson.
Lua i Stíl Chicago (17ú heag.)Calmon, Pedro, agus William Spence Robertson. América Colonial, Portuguesa E Inglesa. Argentina: Jackson, 1940.
Lua MLA (9ú heag.)Calmon, Pedro, agus William Spence Robertson. América Colonial, Portuguesa E Inglesa. Jackson, 1940.
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