Engstrom, T. W. (1967). Managing your time: Practical guidelines on the effective use oftime. Zondervan.
芝加哥风格引文Engstrom, Ted W. Managing Your Time: Practical Guidelines on the Effective Use Oftime. Zondervan, 1967.
MLA引文Engstrom, Ted W. Managing Your Time: Practical Guidelines on the Effective Use Oftime. Zondervan, 1967.
警告：这些引文格式不一定是100％准确.