APA (7th ed.) Citation

Evenhuis, N. L., & Greathead, D. J. (1999). World catalog of bee flies (Diptera, Bombyliidae). Backhuys.

Chicago Style (17th ed.) Citation

Evenhuis, N. L., and D. J. Greathead. World Catalog of Bee Flies (Diptera, Bombyliidae). Leiden: Backhuys, 1999.

MLA (9th ed.) Citation

Evenhuis, N. L., and D. J. Greathead. World Catalog of Bee Flies (Diptera, Bombyliidae). Backhuys, 1999.