APA

Katz R. S., . (1980). A theory of parties and electoral systems. Baltimore: Johns Hopkins University Press.

Chicago

Katz Richard S, . 1980. A theory of parties and electoral systems. Baltimore: Johns Hopkins University Press.

Harvard

Katz R. S., . (1980). A theory of parties and electoral systems. Baltimore: Johns Hopkins University Press.

MLA

Katz Richard S, . A theory of parties and electoral systems. Baltimore: Johns Hopkins University Press. 1980.