APA (7th ed.) Citation

ScienceDirect (Online service) & Litwack, G. (2019). Opioid hormones. Academic Press.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service) and Gerald Litwack. Opioid Hormones. Amsterdam: Academic Press, 2019.

MLA (9th ed.) Citation

ScienceDirect (Online service) and Gerald Litwack. Opioid Hormones. Academic Press, 2019.

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