Bulatao, J. (1966). The finger abacus. Ateneo de Manila University, Publications Office.
芝加哥风格引文Bulatao, Jaime. The Finger Abacus. Quezon City: Ateneo de Manila University, Publications Office, 1966.
MLA引文Bulatao, Jaime. The Finger Abacus. Ateneo de Manila University, Publications Office, 1966.
警告：这些引文格式不一定是100％准确.