APA (7th ed.) Citation

Johannes Geometra XXX-989. (1931). Hymni in SS. Deiparam. Societas Litterarum Posnaniensis.

Chicago Style (17th ed.) Citation

Johannes Geometra XXX-989. Hymni in SS. Deiparam. Posnaniae: Societas Litterarum Posnaniensis, 1931.

MLA (9th ed.) Citation

Johannes Geometra XXX-989. Hymni in SS. Deiparam. Societas Litterarum Posnaniensis, 1931.

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