WILLEMS, N., EASLY, J. T., & ROLFE, S. T. (1981). Strength of materials. McGraw-hill.
芝加哥风格引文WILLEMS, Nicholas, John T. EASLY, 与 Stanley T. ROLFE. Strength of Materials. New York: McGraw-hill, 1981.
MLA引文WILLEMS, Nicholas, et al. Strength of Materials. McGraw-hill, 1981.
警告：这些引文格式不一定是100％准确.