^ abcdefghijklmnoMichael R.T. Dumper; Bruce E. Stanley, eds. (2008), "Aden", Cities of the Middle East and North Africa, Santa Barbara, USA: ABC-CLIO, p. 8+
^"Yemeni union calls for general strike to protest against low wages", BBC Monitoring Middle East, May 13, 2010 – via LexisNexis Academic, (subscription required (help))
The examples and perspective in this section may not represent a worldwide view of the subject. Please improve this article and discuss the issue on the talk page.(April 2015)
William Milburn (1813), "Aden", Oriental Commerce: containing a geographical description of the principal places in the East Indies, China, and Japan, London: Black, Parry & Co., OCLC6856418
John Macgregor (1844). "Aden". Commercial Statistics. London: C. Knight and Co.
James Horsburgh (1852). "Arabia, South Coast: Aden Bay and Aden Harbor". India Directory: Or, Directions for Sailing to and from the East Indies, China, Australia, and the Interjacent Ports of Africa and South America (6th ed.). London: William H. Allen & Co. – via Google Books.
R.L. Playfair (1859). "Aden". History of Arabia Felix or Yemen. Bombay.
William Perry Fogg (1875), "Aden", Arabistan, Hartford, USA: Dustin, Gilman & Co.
United States Navy (1943). "Aden". Sailing Directions for the Red Sea and the Gulf of Aden. Washington DC: Government Printing Office – via Hathi Trust. (fulltext)
R. J. Gavin. Aden under British Rule 1839–1967 (London: C. Hurst & Co., 1975)
Roxani Eleni Margariti (2007), Aden and the Indian Ocean Trade: 150 Years in the Life of a Medieval Arabian Port, University of North Carolina Press, ISBN9780807830765