Cook, Herbert. "When was Titian born?". Band 25, edited by Henry Thode and Hugo von Tschudi, Berlin, Boston: De Gruyter, 1968, pp. 98-100. https://doi.org/10.1515/9783111442303-008
Cook, Herbert. "When was Titian born?" In Band 25 edited by Henry Thode and Hugo von Tschudi, 98-100. Berlin, Boston: De Gruyter, 1968. https://doi.org/10.1515/9783111442303-008