Cita APA

Ulmer, R. R., Sellnow ,Timothy L., & Seeger,Matthew W. (2011). Effective crisis communication: Moving from crisis to opportunity (2nd ed.). Sage.

Chicago Edition Citation

Ulmer, Robert R., Sellnow ,Timothy L, i Seeger,Matthew W. Effective Crisis Communication: Moving from Crisis to Opportunity. 2nd ed. New Delhi: Sage, 2011.

Cita MLA

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