APA

Grupp F. W., Maurer M., . (1972). Political behavior in the United States: readings in American Government. New York: Appleton-Century-Crofts.

Chicago

Grupp Fred W, Maurer Marvin, . 1972. Political behavior in the United States: readings in American Government. New York: Appleton-Century-Crofts.

Harvard

Grupp F. W., Maurer M., . (1972). Political behavior in the United States: readings in American Government. New York: Appleton-Century-Crofts.

MLA

Grupp Fred W, Maurer Marvin, . Political behavior in the United States: readings in American Government. New York: Appleton-Century-Crofts. 1972.