APA (7th ed.) Citation

Ramsey, D., Read, V., Reavell, W., & Bevia Villalba, H. Chocolate.

Chicago Style (17th ed.) Citation

Ramsey, Don, Vicky Read, William Reavell, and Herminia Bevia Villalba. Chocolate. Madrid.

MLA (9th ed.) Citation

Ramsey, Don, et al. Chocolate.