APA (7th ed.) Citation

Robinson, C. H. (1898). The slave trade in the west African hinterland. [publisher not identified].

Chicago Style (17th ed.) Citation

Robinson, C. H. The Slave Trade in the West African Hinterland. [Place of publication not identified]: [publisher not identified], 1898.

MLA (9th ed.) Citation

Robinson, C. H. The Slave Trade in the West African Hinterland. [publisher not identified], 1898.