Leas, S. (1978). Time management: A working guide for church leaders. Abingdon Press.
Citace podle Chicago (17th ed.)Leas, Speed. Time Management: A Working Guide for Church Leaders. Nashville: Abingdon Press, 1978.
Citace podle MLA (8th ed.)Leas, Speed. Time Management: A Working Guide for Church Leaders. Abingdon Press, 1978.
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