● Lawson PA,Citron DM,Tyrrell KL,Finegold SM (2016). Reclassification of Clostridium difficile as Clostridioides difficile (Hall and O'Toole 1935) Prévot 1938.
Anaerobe 40, 95-9.
● Prévot AR (1938). Études de systématique bactérienne. IV. Critique de la conception actuelle du genre Clostridium.
Ann. Inst. Pasteur (Paris) 61, 72–91.
● Hall IC,O'toole E (1935). Intestinal flora in newborn infants with a description of a new pathogenic anaerobe, Bacillus difficilis.
Am. J. Dis. Child. 49, 390-402.
● Gerald LM,John EB, Ralph D (2005). Clostridium botulinum (Botulism).
In Mandell, Douglas, and Bennett,Edition: 6, pp. 2822-2828. Edited by Thomas PB. Pennsylvania: Elsevier Churchill Livingstone.