Heer, D. (1978). Society and population (2nd.). Prentice Hall.
Chicago Style aipamenaHeer, David. Society and Population. 2nd. New Delhi: Prentice Hall, 1978.
MLA aipamenaHeer, David. Society and Population. 2nd. Prentice Hall, 1978.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.