APA (7th ed.) Citation

Baker, J. R., Kreier, J. P., Kreier, J. P., & Kreier, J. P. (1991). Parasitic protozoa (2nd ed.). Academic Press.

Chicago Style (17th ed.) Citation

Baker, John R., Julius P. Kreier, Julius P. Kreier, and Julius Peter Kreier. Parasitic Protozoa. 2nd ed. San Diego London: Academic Press, 1991.

MLA (8th ed.) Citation

Baker, John R., et al. Parasitic Protozoa. 2nd ed. Academic Press, 1991.