Hafen, B. Q., Karren, K. J., & Frandsen, K. J. (1999). First aid for colleges and universities (7th ed.). Boston: Allyn and Bacon.
Stile di citazione ChicagoHafen, Brent Q., Keith J. Karren, e Kathryn J. Frandsen. First Aid for Colleges and Universities. 7th ed. Boston: Allyn and Bacon, 1999.
Citazione MLAHafen, Brent Q., Keith J. Karren, e Kathryn J. Frandsen. First Aid for Colleges and Universities. 7th ed. Boston: Allyn and Bacon, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.