Thatcher, D. A. (1973). Teaching, loving, and self-directed learning. Goodyear Pub. Co.
芝加哥风格引文Thatcher, David A. Teaching, Loving, and Self-directed Learning. Pacific Palisades, Calif.: Goodyear Pub. Co, 1973.
MLA引文Thatcher, David A. Teaching, Loving, and Self-directed Learning. Goodyear Pub. Co, 1973.
警告：这些引文格式不一定是100％准确.