ماخذ: Dixit Dominus Petrus. Contains a canon at the unison between the two top parts. Francisco Guerrero. A cappella. Language.
ترجمه: The title and opening words are ungrammatical, and should read 'Dixit Dominus Petro'. فرانسیسکو گررو. cappella. مقدس، سرود چند صدایی.