APA (7th ed.) Citation

Valter, K., & Arrizabalaga, P. (1998). Designer drugs directory. Elsevier.

Chicago Style (17th ed.) Citation

Valter, Karel, and Philippe Arrizabalaga. Designer Drugs Directory. Amsterdam ; New York: Elsevier, 1998.

MLA (9th ed.) Citation

Valter, Karel, and Philippe Arrizabalaga. Designer Drugs Directory. Elsevier, 1998.