Hula, K. W. (1999). Lobbying together: Interest group coalitions in legislative politics. Georgetown University Press.
Chicago-referens (17:e uppl.)Hula, Kevin W. Lobbying Together: Interest Group Coalitions in Legislative Politics. Washington, DC: Georgetown University Press, 1999.
MLA-referens (8:e uppl.)Hula, Kevin W. Lobbying Together: Interest Group Coalitions in Legislative Politics. Georgetown University Press, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.