Peter of les Vaux-de-Cernay. 

Peter of les Vaux-de-Cernay (Petri Vallium Sarnaii). Petri Vallium Sarnaii monachi Hystoria albigensis. 3 vols., Edited by Pascal Guébin and Ernest Lyon. Paris: 1926-1939.

English Translation: Vaux-de-Cernay, Peter of les. The History of the Albigensian Crusade, Edited and translated by W.A. Sibly and M.D. Sibly. Woodbridge, Suffolk: 1998.

 

William of Puylaurens

Chronica Magistri Guillelmi de Podio Laurentii

Latin edition: Guilelmus de Podio-Laurentii, Chronique = Chronica magistri Guillelmi de Podio Laurentii: text édité, traduit et annoté par Jean Duvernoy Paris, Edited by Jean Duvernoy. Éditions du Centre national de la recherche scientifique, 1976.

English translation: The chronicle of William of Puylaurens – the Albigensian crusade and its aftermath. Translated by W.A. Sibly and M.D. Sibly. Woodbridge, Suffolk: 2003.

 

William (Guillaume, Guilhelm) de Tudèla. d. 1214
Chanson de la croisade albeigoiseEdition: Paul Meyer, ed. and tr.. La chanson de la croisade contre les Albigeois, commencée par Guillaume de Tudèle et continuées par un poète anonyme. Paris, Renouard, 1875-1879.Edition: Martin-Chabot, Eugène, ed. and tr. . La chanson de la croisade albigeoise. 3 volumes. Paris : Librairie Ancienne Honoré Champion, 1931.English translation: The Song of the Cathar Wars: a history of the Albigensian Crusade. Tr. Janet Shirley. Ashgate 2000. 
Sermons preached for the Albigensian Crusades

For the time being, see Bériou, Nicole. “La prédication de croisade de Philippe le Chancelier et d’Eudes de Châteauroux en 1226.” Cahiers de Fanjeaux 32  (1997): 85-109.

Translations are forthcoming by Bériou and Christoph Maier.

 

 Source book

The Cathars and the Albigensian Crusade: A Sourcebook, ed. and tr. Catherine Léglu, Rebecca Rist and Claire Taylor (Abingdon: Routledge, 2014).

 Source book

includes relevant material.
John Arnold and Peter Biller, eds., Heresy and inquisition in France, 1200-1300. Manchester University Press: 2016.