^Helms, Doris R.; Helms, Carl W.; Kosinski, Robert J.; Cummings, John C. (2015). Biology in the Laboratory with BioBytes 3.1 CD-ROM, W. H. Freeman. BiggerBooks. ISBN 9780716731467 (revised Nov 2023)
^Helms (2012). More Biology in the Laboratory, W. H. Freeman & Company. Indigo. ISBN 9780716731467 (revised May 2023)
^ (2013). Biology in the Laboratory with BioBytes 3.1 CD-ROMECampus. ISBN 9780716731467 (revised Sep 2018)