^Adkins,Lesley Adkins,Roy A.（1998）. Handbook to Life in Ancient Rome.Oxford University Press,USA.ISBN:9780195123326.
^According to Apollodorus as quoted by Philodemus, Cleanthes was born in Aristophanes' archonship (331/0 BC) and died in Jason's Archonship (230/29 BC). Pseudo-Lucian, Valerius Maximus, and Censorinus say that Cleanthes lived to the age of 99 (although Diogenes Laërtius says he died at the age of 80.) For more information see Tiziano Dorandi, Chapter 2: Chronology, in Algra et al. (1999) The Cambridge History of Hellenistic Philosophy, page 38. Cambridge. Dorandi prefers an age of 101.