Lua APA (7ú heag.)
Ouma, S. J. (1990). The transformation of the informal sector: The co-operative perspective. Shirikon Publishers.
Lua i Stíl Chicago (17ú heag.)
Ouma, Sylvester J. The Transformation of the Informal Sector: The Co-operative Perspective. Nairobi, Kenya: Shirikon Publishers, 1990.
Lua MLA (9ú heag.)
Ouma, Sylvester J. The Transformation of the Informal Sector: The Co-operative Perspective. Shirikon Publishers, 1990.
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