兵 (國際象棋)[2025-02-04] (中文(臺灣)). Pritchard, D. B. Chaturanga. Beasley, John (编). The Classified Encyclopedia of Chess Variants. John Beasley. 2007: 263. ISBN 978-0-9555168-0-1
国际学生能力评估计划Psychological Science, 4 (6): 551–577, doi:10.1111/j.1745-6924.2009.01165.x Bishop, John H (1997), "The effect of national standards and curriculum-based exams