APA (7th ed.) Citation

Cowan, A. M., & Latrobe, J. H. B. (1855). African colonization. [publisher not identified].

Chicago Style (17th ed.) Citation

Cowan, Alexander M., and John H. B. Latrobe. African Colonization. [Frankfort, Ky.]: [publisher not identified], 1855.

MLA (9th ed.) Citation

Cowan, Alexander M., and John H. B. Latrobe. African Colonization. [publisher not identified], 1855.