MLA

Gabio, Giovanni Battista, d. 1590. Kalendarion Gregorianon aidion o nyn prostagmati tou hagiotatou kai makariotatou Gregoriou Triskaidekatou ... / ek tes Latinon phones eis ten Helenida dialekton Ioannes Baptistes o Gabios metenenken. [alpha][phi][pi][gamma][1583]. https://collections.library.yale.edu/catalog/2110549.

APA, 6th edition

Gabio, Giovanni Battista, d. 1590. ([alpha][phi][pi][gamma][1583])[Kalendarion Gregorianon aidion o nyn prostagmati tou hagiotatou kai makariotatou Gregoriou Triskaidekatou ... / ek tes Latinon phones eis ten Helenida dialekton Ioannes Baptistes o Gabios metenenken]. https://collections.library.yale.edu/catalog/2110549.