Gregory XV, P., & Butter, N. (1623). The Pope's letter to the Prince in Latine, Spanish, and English done according to the Latine and Spanish coppies printed at Madrid. A Jesuites oration to the Prince, in Latine and English. Printed for Nathaniell Butter.
Παραπομπή σε μορφή Chicago (17η εκδ.)Gregory XV, Pope, και Nathaniel Butter. The Pope's Letter to the Prince in Latine, Spanish, and English Done According to the Latine and Spanish Coppies Printed at Madrid. A Jesuites Oration to the Prince, in Latine and English. London: Printed for Nathaniell Butter, 1623.
Παραπομπή σε μορφή MLA (8th εκδ.)Gregory XV, Pope, και Nathaniel Butter. The Pope's Letter to the Prince in Latine, Spanish, and English Done According to the Latine and Spanish Coppies Printed at Madrid. A Jesuites Oration to the Prince, in Latine and English. Printed for Nathaniell Butter, 1623.