Engstrom, T. W. (1967). Managing your time: Practical guidelines on the effective use oftime. Zondervan.
Citazione stile Chigago Style (17a edizione)Engstrom, Ted W. Managing Your Time: Practical Guidelines on the Effective Use Oftime. Zondervan, 1967.
Citatione MLA (9a ed.)Engstrom, Ted W. Managing Your Time: Practical Guidelines on the Effective Use Oftime. Zondervan, 1967.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.