Ulmer, Robert R. Effective crisis communication: moving from crisis to opportunity [online]. Fourth edition. [Washington, D.C.]: SAGE Publications, Inc, 2018. Core textbook
Ulmer, R. R. (2018). Effective crisis communication: Moving from crisis to opportunity (Fourth edition.). [Washington, D.C.]: SAGE Publications, Inc.
Styl ChicagoUlmer, Robert R. Effective Crisis Communication: Moving From Crisis to Opportunity. Fourth edition. [Washington, D.C.]: SAGE Publications, Inc, 2018.
Citace podle MLAUlmer, Robert R. Effective Crisis Communication: Moving From Crisis to Opportunity. Fourth edition. [Washington, D.C.]: SAGE Publications, Inc, 2018.
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