Cybriwsky 2011, p. 138 Cybriwsky, Roman Adrian (2011), Roppongi Crossing: The Demise of a Tokyo Nightclub District and the Reshaping of a Global City, University of Georgia Press, ISBN9780820338316
Cybriwsky 2011, p. 140 Cybriwsky, Roman Adrian (2011), Roppongi Crossing: The Demise of a Tokyo Nightclub District and the Reshaping of a Global City, University of Georgia Press, ISBN9780820338316
Kawada 2008, p. 172 川田薫 [Kawada Kaoru] (December 2008), ナイジェリア人移住者の生活と資本形成に関する日米比較——関東と米国テキサス州の移住者の事例から [USA-Japan comparison of life and capital formation among Nigerian migrants: based on migrants in Kanto and Texas], 日本で暮らす外国人 [Foreigners living in Japan], Intriguing Asia, vol. 117, Bensey Publishing, pp. 172–179, ISBN978-4-585-10414-8, OCLC294935624
Summary presentation available online: 川田薫 [Kawada Kaoru] (November 2008), 日本と米国におけるナイジェリア人移住者のコミュニティと資本形成に関する事例報告——関東地域と米国テキサス州の移住者からの聞き取り調査から [Community and capital formation among Nigerian migrants in Japan and the United States: based on research among migrants in Texas and Kanto] (PDF), Annual Meeting of the Japan Sociological Society, 81, retrieved 2011-06-25
Kawada 2008, p. 172 川田薫 [Kawada Kaoru] (December 2008), ナイジェリア人移住者の生活と資本形成に関する日米比較——関東と米国テキサス州の移住者の事例から [USA-Japan comparison of life and capital formation among Nigerian migrants: based on migrants in Kanto and Texas], 日本で暮らす外国人 [Foreigners living in Japan], Intriguing Asia, vol. 117, Bensey Publishing, pp. 172–179, ISBN978-4-585-10414-8, OCLC294935624
Summary presentation available online: 川田薫 [Kawada Kaoru] (November 2008), 日本と米国におけるナイジェリア人移住者のコミュニティと資本形成に関する事例報告——関東地域と米国テキサス州の移住者からの聞き取り調査から [Community and capital formation among Nigerian migrants in Japan and the United States: based on research among migrants in Texas and Kanto] (PDF), Annual Meeting of the Japan Sociological Society, 81, retrieved 2011-06-25