APA (7th ed.) Citation

Hellman, L. M. (1978). Obstetricia (6ed.). salvat.

Chicago Style (17th ed.) Citation

Hellman, Louis M. Obstetricia. 6ed. México, D.F: salvat, 1978.

MLA (9th ed.) Citation

Hellman, Louis M. Obstetricia. 6ed. salvat, 1978.