APA

Duncan William R,, . (1996). A guide to the project management body of knowledge. New York: Project Management Institute.

Chicago

Duncan William R,, . 1996. A guide to the project management body of knowledge. New York: Project Management Institute.

Harvard

Duncan William R,, . (1996). A guide to the project management body of knowledge. New York: Project Management Institute.

MLA

Duncan William R,, . A guide to the project management body of knowledge. New York: Project Management Institute. 1996.