APA

Gill J., . (2006). Essential mathematics for political and social research. New York, USA: Cambridge University Press.

Chicago

Gill Jeff, . 2006. Essential mathematics for political and social research. New York, USA: Cambridge University Press.

Harvard

Gill J., . (2006). Essential mathematics for political and social research. New York, USA: Cambridge University Press.

MLA

Gill Jeff, . Essential mathematics for political and social research. New York, USA: Cambridge University Press. 2006.