APA (7th ed.) Citation

Keren, G., & Ayala, G. Factors associated with hyperemesis gravidarum. IMR Press.

Chicago Style (17th ed.) Citation

Keren, G., and G. Ayala. Factors Associated with Hyperemesis Gravidarum. IMR Press.

MLA (9th ed.) Citation

Keren, G., and G. Ayala. Factors Associated with Hyperemesis Gravidarum. IMR Press.

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