Vervoort, G., & Mason, D. J. (1980). Beginning calculator math. D.S. Lake.
芝加哥风格引文Vervoort, Gerardus, 与 Dale J. Mason. Beginning Calculator Math. Belmont, Calif: D.S. Lake, 1980.
MLA引文Vervoort, Gerardus, 与 Dale J. Mason. Beginning Calculator Math. D.S. Lake, 1980.
警告：这些引文格式不一定是100％准确.