Gaya APA
Cheibub, J, A. (2007).
Presidentialism, Parliamentarism, and Democracy (Ed. 1).
Amerika Serikat:
Cambridge University Press.
Gaya MLA
Cheibub, Jose, Antonio.
"Presidentialism, Parliamentarism, and Democracy".
Ed. 1
Amerika Serikat:
Cambridge University Press,
2007.
Text.