Cita APA (7a ed.)

Akil, H., Herz, A., & Simon, E. J. (1993). Opioids. Springer-Verlag.

Cita Chicago Style (17a ed.)

Akil, Huda, Albert Herz, y Eric J. Simon. Opioids. Berlin: Springer-Verlag, 1993.

Cita MLA (9a ed.)

Akil, Huda, et al. Opioids. Springer-Verlag, 1993.