Canonigo, C. S. (1993). Book of tongue twisters (1993 ed.). C.S. Canonigo.
芝加哥风格引文Canonigo, Cristina Santos. Book of Tongue Twisters. 1993 ed. Cebu City: C.S. Canonigo, 1993.
MLA引文Canonigo, Cristina Santos. Book of Tongue Twisters. 1993 ed. C.S. Canonigo, 1993.
警告：这些引文格式不一定是100％准确.