Dyfyniad APA

Ulmer, R. R., Seeger, M. W., & Sellnow, T. L. (2011). Effective crisis communication: Moving from crisis to opportunity (2nd ed.). SAGE.

Dyfyniad Arddull Chicago

Ulmer, Robert R., Mathew W. Seeger, and Timothy L. Sellnow. Effective Crisis Communication: Moving from Crisis to Opportunity. 2nd ed. Los Angeles: SAGE, 2011.

Dyfyniad MLA

Ulmer, Robert R., et al. Effective Crisis Communication: Moving from Crisis to Opportunity. 2nd ed. SAGE, 2011.

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