urn:cts:greekLit:tlg0363.tlg007.perseus-grc2
Ptolemy. Tetrabiblos. Robbins, Frank Egleston, editor. Cambridge, MA: Harvard University Press; London: William Heinemann Ltd., 1964 (printing).
urn:cts:greekLit:tlg0363.tlg007.1st1K-grc1
Claudius Ptolemaeus. Claudii Ptolemaei opera quae exstant omnia, Volume 3.1.
Boll, Franz, and Boer, Emilie, editors. Leipzig: Teubner, 1954.