Southall, R. (1975). Cadbury on the Gold Coast, 1907-1938: The dilemma of the "model firm" in a colonial economy. University of Birminghaml.
Lua i Stíl Chicago (17ú heag.)Southall, Roger. Cadbury on the Gold Coast, 1907-1938: The Dilemma of the "Model Firm" in a Colonial Economy. England: University of Birminghaml, 1975.
Lua MLA (8ú heag.)Southall, Roger. Cadbury on the Gold Coast, 1907-1938: The Dilemma of the "Model Firm" in a Colonial Economy. University of Birminghaml, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.