Difco & BBL Manual(PDF) (2nd ed.). Sparks, Maryland: Difco Laboratories, Becton Dickinson and Company. 2009. p. 508. ISBN978-0-9727207-1-7. Archived from the original(PDF) on 2016-03-04. Retrieved Jan 14, 2016.
Difco & BBL Manual(PDF) (2nd ed.). Sparks, Maryland: Difco Laboratories, Becton Dickinson and Company. 2009. p. 508. ISBN978-0-9727207-1-7. Archived from the original(PDF) on 2016-03-04. Retrieved Jan 14, 2016.
Koneman's color atlas and textbook of diagnostic microbiology. Washington C. Winn, Elmer W. Koneman (6th ed.). Philadelphia: Lippincott Williams & Wilkins. 2006. ISBN0-7817-3014-7. OCLC58598402.{{cite book}}: CS1 maint: others (link)