Heatherley, J. L. (1971). Unworld people. Harper & Row.
Chicago Style (17th ed.) ZitazioaHeatherley, Joyce L. Unworld People. Cambridge: Harper & Row, 1971.
MLA (9th ed.) ZitazioaHeatherley, Joyce L. Unworld People. Harper & Row, 1971.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.