APA (7th ed.) Citation

Catholic Church, Durand, G., & Andrieu, M. (1938). Le pontifical romain au moyen-âge. Biblioteca apostolica vaticana.

Chicago Style (17th ed.) Citation

Catholic Church, Guillaume Durand, and Michel Andrieu. Le Pontifical Romain Au Moyen-âge. Città del Vaticano: Biblioteca apostolica vaticana, 1938.

MLA (8th ed.) Citation

Catholic Church, et al. Le Pontifical Romain Au Moyen-âge. Biblioteca apostolica vaticana, 1938.

Warning: These citations may not always be 100% accurate.