APA

Van Horn C. E., Baumer D. C. & Gormley W. T. (1989). Politics and public policy. Washington, D.C: CQ Press.

Chicago

Van Horn Carl E, Baumer Donald C and Gormley William T. 1989. Politics and public policy. Washington, D.C: CQ Press.

Harvard

Van Horn C. E., Baumer D. C. and Gormley W. T. (1989). Politics and public policy. Washington, D.C: CQ Press.

MLA

Van Horn Carl E, Baumer Donald C and Gormley William T. Politics and public policy. Washington, D.C: CQ Press. 1989.