APA (7th ed.) Citation

Duffy, J., Frey, M., & Sims, M. (1978). International directory of scholars and specialists in African studies. Crossroads Press.

Chicago Style (17th ed.) Citation

Duffy, James, Mitsue Frey, and Michael Sims. International Directory of Scholars and Specialists in African Studies. Waltham, Mass.: Crossroads Press, 1978.

MLA (9th ed.) Citation

Duffy, James, et al. International Directory of Scholars and Specialists in African Studies. Crossroads Press, 1978.