Heer, P. de. The care-taker emperor, 1986 t.p. (Chu Ch‘i-yü; fifteenth-century) p. 1, etc. (His reign period known as Ching-t‘ai period, post-humously known as Ching-ti)
Dict. Ming biog. p. 294, etc. (Chu Ch‘i-yü, b. 9-11-1428, d. 3-14-1457, who ruled during the year, 1450-57; emperor of Ming dynasty, granted temple-name Tai-tsung, usually known by the name Ching-ti)
Chung-kuo li shih chi nien piao, 1958, 1961 printing p. 110 (Ming Tai-tsung, Chu Ch‘i-yü)