Engstrom, T. W. (1967). Managing your time: Practical guidelines on the effective use oftime. Zondervan.
Chicago-čujuhus (17. p.)Engstrom, Ted W. Managing Your Time: Practical Guidelines on the Effective Use Oftime. Zondervan, 1967.
MLA-čujuhus (9. p.)Engstrom, Ted W. Managing Your Time: Practical Guidelines on the Effective Use Oftime. Zondervan, 1967.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.