Greenfield, R. E. (1924). Comparison of chemical and bacteriological examinations made on the Illinois River during a season of low and a season of high water: 1923 - 1924. [Illinois state register, state printer].
Chicago-Zitierstil (17. Ausg.)Greenfield, Robert Edman. Comparison of Chemical and Bacteriological Examinations Made on the Illinois River During a Season of Low and a Season of High Water: 1923 - 1924. Urbana, Ill: [Illinois state register, state printer], 1924.
MLA-Zitierstil (9. Ausg.)Greenfield, Robert Edman. Comparison of Chemical and Bacteriological Examinations Made on the Illinois River During a Season of Low and a Season of High Water: 1923 - 1924. [Illinois state register, state printer], 1924.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.