Bullough, R. V. (1974). Creating instructional materials. C. E. Merrill Pub. Co.
芝加哥风格引文Bullough, Robert V. Creating Instructional Materials. Columbus, Ohio: C. E. Merrill Pub. Co, 1974.
MLA引文Bullough, Robert V. Creating Instructional Materials. C. E. Merrill Pub. Co, 1974.
警告：这些引文格式不一定是100％准确.