Nypan, A. (1960). Market trade: A sample survey of market traders in Accra. Economic Research Division, University College of Ghana.
Chicago-referens (17:e uppl.)Nypan, Astrid. Market Trade: A Sample Survey of Market Traders in Accra. [Legon, Ghana?]: Economic Research Division, University College of Ghana, 1960.
MLA-referens (8:e uppl.)Nypan, Astrid. Market Trade: A Sample Survey of Market Traders in Accra. Economic Research Division, University College of Ghana, 1960.
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