APA Style

DRUCKER, P, F., Coombs, W, T. (2015). Ongoing crisis communication : planning, managing, and respondin (4th ed). London: SAGE Publications.

MLA Style

DRUCKER, PETER, F.., Coombs, W., Timothy. "Ongoing crisis communication : planning, managing, and respondin". 4th ed London: SAGE Publications, 2015. Art Original.