Helms, C. A. (1995). Fundamentals of skeletal radiology (2nd ed.). Saunders.
芝加哥风格引文Helms, Clyde A. Fundamentals of Skeletal Radiology. 2nd ed. Philadelphia, PA: Saunders, 1995.
MLA引文Helms, Clyde A. Fundamentals of Skeletal Radiology. 2nd ed. Saunders, 1995.
警告：这些引文格式不一定是100％准确.