Gaya APA

Patton, C, V., Sawicki, D, S. (1993). Basic methods of policy analysis and planning (2nd ed). Englewood Cliffs, NJ: Prentice Hall.

Gaya MLA

Patton, Carl, V.., Sawicki, David, S.. "Basic methods of policy analysis and planning". 2nd ed Englewood Cliffs, NJ: Prentice Hall, 1993. Text.