Testimonia et Fragmenta
Cleanthes
Cleanthes. Stoicorum veterum fragmenta, Vol. 1. von Arnim, Hans Friedrich August, editor. Stuttgart: Teubner, 1903. (1964 printing.)
Diogenes Laërt. VII 91. διδακτήν τε εἶναι αὐτὴν (λέγω δὲ τὴν ἀρετὴν) καὶ Χρύσιππος ἐν τῷ πρώτῳ περὶ τέλους φησὶ καὶ Κλεάνθης, καὶ Ποσειδώνιος ἐν τοῖς προτρεπτικοῖς.