Brown, L. R. (1989). State of the world 1988. Prentice-Hall of India.
Chicago Style aipamenaBrown, Lester R. State of the World 1988. New York: Prentice-Hall of India, 1989.
MLA aipamenaBrown, Lester R. State of the World 1988. Prentice-Hall of India, 1989.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.