Grewal, J. S. (1991). The Sikhs of the Punjab (Second edition.). Cambridge University Press.
Chicago Style aipamenaGrewal, J. S. The Sikhs of the Punjab. Second edition. Cambridge [England] ; New York: Cambridge University Press, 1991.
MLA aipamenaGrewal, J. S. The Sikhs of the Punjab. Second edition. Cambridge University Press, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.