APA

Drucker Peter F, Collins Jim, . (2008). The five most important questions you will ever ask about your organization. New York: Leader to Leader Institute.

Chicago

Drucker Peter F, Collins Jim, . 2008. The five most important questions you will ever ask about your organization. New York: Leader to Leader Institute.

Harvard

Drucker Peter F, Collins Jim, . (2008). The five most important questions you will ever ask about your organization. New York: Leader to Leader Institute.

MLA

Drucker Peter F, Collins Jim, . The five most important questions you will ever ask about your organization. New York: Leader to Leader Institute. 2008.