APA
Polsby N. W., . (2012). Presidential elections. Lanham, MD: Rowman & Littlefield Publishers.
Chicago
Polsby Nelson W, . 2012. Presidential elections. Lanham, MD: Rowman & Littlefield Publishers.
Harvard
Polsby N. W., . (2012). Presidential elections. Lanham, MD: Rowman & Littlefield Publishers.
MLA
Polsby Nelson W, . Presidential elections. Lanham, MD: Rowman & Littlefield Publishers. 2012.