(1891). Companhia Real dos Caminhos de Ferro Portuguezes. Typ. da Companhia dos Caminhos de Ferro Portuguezes.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিCompanhia Real Dos Caminhos De Ferro Portuguezes. Typ. da Companhia dos Caminhos de Ferro Portuguezes, 1891.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিCompanhia Real Dos Caminhos De Ferro Portuguezes. Typ. da Companhia dos Caminhos de Ferro Portuguezes, 1891.
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