APA

Project Management Institute, . (2008). A guide to the project management body of knowledge (PMBOK guide). Newtown Square, Pa: Project Management Institute, Inc.

Chicago

Project Management Institute, . 2008. A guide to the project management body of knowledge (PMBOK guide). Newtown Square, Pa: Project Management Institute, Inc.

Harvard

Project Management Institute, . (2008). A guide to the project management body of knowledge (PMBOK guide). Newtown Square, Pa: Project Management Institute, Inc.

MLA

Project Management Institute, . A guide to the project management body of knowledge (PMBOK guide). Newtown Square, Pa: Project Management Institute, Inc. 2008.