Pèire Bec, "Occitan", in Rebecca Posner, John N. Green eds. Language and philology in Romance, Walter de Gruyter, 1982. Reprint Volume 3 Language and Philology in Romance. 2011. Berlin, Boston: De Gruyter Mouton. Retrieved 24 Nov. 2015, from http://www.degruyter.com/view/product/48412Архивирано на сајту Wayback Machine (20. јун 2018)
Pèire Bec, "Occitan", in Rebecca Posner, John N. Green eds. Language and philology in Romance, Walter de Gruyter, 1982. Reprint Volume 3 Language and Philology in Romance. 2011. Berlin, Boston: De Gruyter Mouton. Retrieved 24 Nov. 2015, from http://www.degruyter.com/view/product/48412Архивирано на сајту Wayback Machine (20. јун 2018)