O'Sullivan, E., Rassel, G. R., & Berner, M. (2012). Research methods for public administrators (6th ed.). Longman.
Citazione stile Chigago Style (17a edizione)O'Sullivan, Elizabethann, Gary R. Rassel, e Maureen Berner. Research Methods for Public Administrators. 6th ed. Boston: Longman, 2012.
Citatione MLA (9a ed.)O'Sullivan, Elizabethann, et al. Research Methods for Public Administrators. 6th ed. Longman, 2012.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.