Cita APA (7a ed.)
PA, Z. (May/Jun1999). Drug samples -- can I or can't I?...first published in the January/February 1999 issue of NP World News. American Journal for Nurse Practitioners, 3(3), 7-8.
Cita Chicago Style (17a ed.)
PA, Zimmer. "Drug Samples -- Can I or Can't I?...first Published in the January/February 1999 Issue of NP World News." American Journal for Nurse Practitioners 3, no. 3 (May/Jun1999): 7-8.
Cita MLA (9a ed.)
PA, Zimmer. "Drug Samples -- Can I or Can't I?...first Published in the January/February 1999 Issue of NP World News." American Journal for Nurse Practitioners, vol. 3, no. 3, May/Jun1999, pp. 7-8.
Precaución: Estas citas no son 100% exactas.