APA (7th ed.) Citation

Barbui, C., & Garattini, S. (1997). Tryptophan and depression.

Chicago Style (17th ed.) Citation

Barbui, C., and S. Garattini. Tryptophan and Depression. 1997.

MLA (9th ed.) Citation

Barbui, C., and S. Garattini. Tryptophan and Depression. 1997.

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