Cita APA (7a ed.)

Cunningham, F. G., Leveno, K. J., Bloom, S. L., Hauth, J. C., Gilstrap III, L., Wenstrom, K. D., . . . Pérez-Tamayo Ruiz, A. M. (2006). OBSTETRICIA de Williams (22a. ed.). McGraw-Hill Interamericana.

Cita Chicago Style (17a ed.)

Cunningham, F. Gary, et al. OBSTETRICIA De Williams. 22a. ed. México, (etc.): McGraw-Hill Interamericana, 2006.

Cita MLA (9a ed.)

Cunningham, F. Gary, et al. OBSTETRICIA De Williams. 22a. ed. McGraw-Hill Interamericana, 2006.