HOPSON, J. L. (1990). Study Guide To Accompany Essential Of Biology. McGraw-Hill.
Chicago Style aipamenaHOPSON, Janet L. Study Guide To Accompany Essential Of Biology. McGraw-Hill, 1990.
MLA aipamenaHOPSON, Janet L. Study Guide To Accompany Essential Of Biology. McGraw-Hill, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.