HiebingR.G.Jr.CooperS. (1991). How to Write a Successful Marketing Plan, Lincolnwood, IL: NTC Business Books.
5.
PlotkinS.A. (1993). Adolescents and Human Immunodeficiency Virus Infection: The Role of the Pediatrician in Prevention and Intervention. Pediatrics, 92 (4) pp. 626–629.