Cita APA (7a ed.)

O'Neill, J. A., & Visher, C. (1991). Drug use forecasting.

Cita Chicago Style (17a ed.)

O'Neill, Joyce Ann, y Christy Visher. Drug Use Forecasting. 1991.

Cita MLA (9a ed.)

O'Neill, Joyce Ann, y Christy Visher. Drug Use Forecasting. 1991.