^United Nations Department for Economic and Social Information and Policy Analysis, Statistics Division (1997). "Population of capital cities and cities of 100,000 and more inhabitants". 1995 Demographic Yearbook. New York. pp. 262–321. ((cite book)): |author= has generic name (help)CS1 maint: location missing publisher (link)
J.C.R. Milliet de Saint-Adolphe (1863), "Recife", Diccionario geographico, historico e descriptivo, do imperio do Brazil (in Portuguese), Paris: J. P. Aillaud, hdl:2027/wu.89006303077 – via Hathi Trust
Gilberto Freyre (1934). Guia Prático, Histórico e Sentimental da Cidade do Recife (in Portuguese).