^Procop, Gary W.; Church, Deirdre L.; Hall, Geraldine S.; Janda, William M. (July 2020). Koneman's Color Atlas and Textbook of Diagnostic Microbiology. Jones & Bartlett Learning. p. 774. ISBN978-1-284-32237-8.
^McVey, D. Scott; Kennedy, Melissa; Chengappa, M. M. (30 May 2013). Veterinary Microbiology. John Wiley & Sons. ISBN978-1-118-65062-2.