Qayum, A. (1967). Numerical models of economic development. Rotterdam University Press.
Lua i Stíl Chicago (17ú heag.)Qayum, Abdul. Numerical Models of Economic Development. Rotterdam: Rotterdam University Press, 1967.
Lua MLA (9ú heag.)Qayum, Abdul. Numerical Models of Economic Development. Rotterdam University Press, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.