Grupe, D., & Grupe, D. (2019). Stephen of Pisa and Antioch: Liber Mamonis: An Introduction to Ptolemaic Cosmology and Astronomy from the Early Crusader States (1st ed. 2019.). Springer International Publishing : Imprint: Springer. https://doi.org/10.1007/978-3-030-19234-1
Παραπομπή σε μορφή Chicago (17η εκδ.)Grupe, Dirk, και Dirk Grupe. Stephen of Pisa and Antioch: Liber Mamonis: An Introduction to Ptolemaic Cosmology and Astronomy from the Early Crusader States. 1st ed. 2019. Cham: Springer International Publishing : Imprint: Springer, 2019. https://doi.org/10.1007/978-3-030-19234-1.
Παραπομπή σε μορφή MLA (8th εκδ.)Grupe, Dirk, και Dirk Grupe. Stephen of Pisa and Antioch: Liber Mamonis: An Introduction to Ptolemaic Cosmology and Astronomy from the Early Crusader States. 1st ed. 2019. Springer International Publishing : Imprint: Springer, 2019. https://doi.org/10.1007/978-3-030-19234-1.
