Gaya APA

Zeng, , D, Z, . (2008). Knowledge, technology, and cluste-based growth in Africa . : The World Bank.Washington, D.C..

Gaya MLA

Zeng, , Douglas, Zhihua, . "Knowledge, technology, and cluste-based growth in Africa". : The World Bank.Washington, D.C., 2008. Koleksi World Bank.