Brockhaus-1911: Homo sum, humani nihil a me alienum puto · Cogito, ergo sum
Eisler-1904: Cogito ergo sum · Cogitor, ergo sum · Cogito, ergo sum
Herder-1854: Homo sum, nihil humani a me alienum puto · Domine, non sum dignus · Cogito ergo sum
Kirchner-Michaelis-1907: homo sum · cogito, ergo sum
Mauthner-1923: Cogito ergo sum
Meyers-1905: Homo sum, nil humani a me alienum puto · Helichrўsum · Cogĭto, ergo sum
Pierer-1857: Homo sum, humani nihil a me aliēnum puto · Cogito, ergo sum