Heyman, R. (1994). Why Didn't you say that in the first place?: : how to be understood at work. Jossey-Bass.
Citace podle Chicago (17th ed.)Heyman, Richard. Why Didn't You Say That in the First Place?: : How to Be Understood at Work. San Francisco: Jossey-Bass, 1994.
Citace podle MLA (9th ed.)Heyman, Richard. Why Didn't You Say That in the First Place?: : How to Be Understood at Work. Jossey-Bass, 1994.
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