APA-viite (7. p.)

Gray, C. F. L. (2014). Project Management (11th ed.). McGraw Hill Education.

Chicago-viite (17. p.)

Gray, Clifford F; Larson. Project Management. 11th ed. New Delhi: McGraw Hill Education, 2014.

MLA-viite (9. p.)

Gray, Clifford F; Larson. Project Management. 11th ed. McGraw Hill Education, 2014.