Snedden, D. S. (1910). The problem of vocational education. Houghton Mifflin company.
芝加哥风格引文Snedden, David Samuel. The Problem of Vocational Education. Boston, New York [etc.]: Houghton Mifflin company, 1910.
MLA引文Snedden, David Samuel. The Problem of Vocational Education. Houghton Mifflin company, 1910.
警告：这些引文格式不一定是100％准确.