Cita APA

Williams, P. H., Thorp, R. W., Richardson, L. L., & Colla, S. R. (2014). Bumble bees of North America: An identification guide. Princeton, New Jersey: Princeton University Press.

Citación estilo Chicago

Williams, Paul H., Robbin W. Thorp, Leif L. Richardson, y Sheila R. Colla. Bumble Bees of North America: An Identification Guide. Princeton, New Jersey: Princeton University Press, 2014.

Cita MLA

Williams, Paul H., Robbin W. Thorp, Leif L. Richardson, y Sheila R. Colla. Bumble Bees of North America: An Identification Guide. Princeton, New Jersey: Princeton University Press, 2014.