Northrup, D. (1978). Trade without rulers: Pre-colonial economic development in south-eastern Nigeria. Clarendon Pr.
Chicago-Zitierstil (17. Ausg.)Northrup, David. Trade Without Rulers: Pre-colonial Economic Development in South-eastern Nigeria. Oxford: Clarendon Pr, 1978.
MLA-Zitierstil (9. Ausg.)Northrup, David. Trade Without Rulers: Pre-colonial Economic Development in South-eastern Nigeria. Clarendon Pr, 1978.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.