APA (7th ed.) Citation

Callen, R. V. (1953). Selected signs of Mary's universal Queenship in medieval liturgy. Marianum.

Chicago Style (17th ed.) Citation

Callen, Robert V. Selected Signs of Mary's Universal Queenship in Medieval Liturgy. Roma: Marianum, 1953.

MLA (9th ed.) Citation

Callen, Robert V. Selected Signs of Mary's Universal Queenship in Medieval Liturgy. Marianum, 1953.