APA (7th ed.) Citation

Marcus, R., Nelson, D., Rosen, C., & Feldman, D. (2008). Osteoporosis.

Chicago Style (17th ed.) Citation

Marcus, Robert, Dorothy Nelson, Clifford Rosen, and David Feldman. Osteoporosis. 2008.

MLA (9th ed.) Citation

Marcus, Robert, et al. Osteoporosis. 2008.