Suen, C., & Gillett-Kaufman, J. L. Marsh Rams-Horn, Marsh Ramshorn Helisoma (Planorbella) trivolvis (Say) (Gastropoda: Planorbidae). The University of Florida George A. Smathers Libraries.
Chicago Style (17th ed.) CitationSuen, Carrie, and Jennifer Lynn Gillett-Kaufman. Marsh Rams-Horn, Marsh Ramshorn Helisoma (Planorbella) Trivolvis (Say) (Gastropoda: Planorbidae). The University of Florida George A. Smathers Libraries.
MLA (9th ed.) CitationSuen, Carrie, and Jennifer Lynn Gillett-Kaufman. Marsh Rams-Horn, Marsh Ramshorn Helisoma (Planorbella) Trivolvis (Say) (Gastropoda: Planorbidae). The University of Florida George A. Smathers Libraries.
Warning: These citations may not always be 100% accurate.