APA (7th ed.) Citation

Hellman, L. M. (1978). Williams Obstetricia. Salvat Editores S.A.

Chicago Style (17th ed.) Citation

Hellman, Louis M. Williams Obstetricia. Barcelona: Salvat Editores S.A, 1978.

MLA (9th ed.) Citation

Hellman, Louis M. Williams Obstetricia. Salvat Editores S.A, 1978.

Warning: These citations may not always be 100% accurate.