APA
Freye E. &. L. J. V., . (2008). Opioids in medicine. Springer, Dordrecht: .
Chicago
Freye Enno & Levy Joseph Victor, . 2008. Opioids in medicine. Springer, Dordrecht: .
Harvard
Freye E. &. L. J. V., . (2008). Opioids in medicine. Springer, Dordrecht: .
MLA
Freye Enno & Levy Joseph Victor, . Opioids in medicine. Springer, Dordrecht: . 2008.