Cita APA

Northrup, D., & Northrup, D. (1978). Trade without rulers: Pre-colonial economic development in South-Eastern Nigeria. Oxford: Clarendon Press.

Citación estilo Chicago

Northrup, David, y David Northrup. Trade Without Rulers: Pre-colonial Economic Development in South-Eastern Nigeria. Oxford: Clarendon Press, 1978.

Cita MLA

Northrup, David, y David Northrup. Trade Without Rulers: Pre-colonial Economic Development in South-Eastern Nigeria. Oxford: Clarendon Press, 1978.