APA-referens (7:e uppl.)
Hessenius, B. (2007). Hardball lobbying for nonprofits: Real advocacy for nonprofits in the new century. Palgrave Macmillan.
Chicago-referens (17:e uppl.)
Hessenius, Barry. Hardball Lobbying for Nonprofits: Real Advocacy for Nonprofits in the New Century. New York: Palgrave Macmillan, 2007.
MLA-referens (9:e uppl.)
Hessenius, Barry. Hardball Lobbying for Nonprofits: Real Advocacy for Nonprofits in the New Century. Palgrave Macmillan, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.