Nypan, A. (1960). Market trade: A sample survey of market traders in Accra. Economic Research Division, University College of Ghana.
Lua i Stíl Chicago (17ú heag.)Nypan, Astrid. Market Trade: A Sample Survey of Market Traders in Accra. [Legon, Ghana?]: Economic Research Division, University College of Ghana, 1960.
Lua MLA (8ú heag.)Nypan, Astrid. Market Trade: A Sample Survey of Market Traders in Accra. Economic Research Division, University College of Ghana, 1960.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.