McLaughlin, R. (1967). The Heartland. New York: Time Inc..
Chicago Style aipamenaMcLaughlin, Robert. The Heartland. New York: Time Inc., 1967.
MLA aipamenaMcLaughlin, Robert. The Heartland. New York: Time Inc., 1967.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.