APA (7th ed.) Citation

Phytochemical Society of Europe, Hostettmann, K., Lea, P. J., & Hostettmann, K. (1987). Biologically active natural products. Clarendon Press.

Chicago Style (17th ed.) Citation

Phytochemical Society of Europe, K. Hostettmann, Peter J. Lea, and K. Hostettmann. Biologically Active Natural Products. Oxford: Clarendon Press, 1987.

MLA (9th ed.) Citation

Phytochemical Society of Europe, et al. Biologically Active Natural Products. Clarendon Press, 1987.