(美)米歇尔·渥克(Michele Wucker)著. (2017). 灰犀牛：如何应对大概率危机：how to recognize and act on the obvious dangers we ignore. 中信出版社.
Dyfyniad Arddull Chicago(美)米歇尔·渥克(Michele Wucker)著. 灰犀牛：如何应对大概率危机：how to Recognize and Act on the Obvious Dangers We Ignore. 中信出版社, 2017.
Dyfyniad MLA(美)米歇尔·渥克(Michele Wucker)著. 灰犀牛：如何应对大概率危机：how to Recognize and Act on the Obvious Dangers We Ignore. 中信出版社, 2017.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.