APA (7th ed.) Citation

Benedikt XVI. Papst, Guardini, R., & Sarah, R. (2020). The spirit of the liturgy (Commemorative edition.). Ignatius Press.

Chicago Style (17th ed.) Citation

Benedikt XVI. Papst, Romano Guardini, and Robert Sarah. The Spirit of the Liturgy. Commemorative edition. San Francisco: Ignatius Press, 2020.

MLA (9th ed.) Citation

Benedikt XVI. Papst, et al. The Spirit of the Liturgy. Commemorative edition. Ignatius Press, 2020.