APA-viite (7. p.)

Spencer, L. M. (1993). Competence at Work (11th.). McGraw-Hill.

Chicago-viite (17. p.)

Spencer, Lyle M. Competence at Work. 11th. Singapore: McGraw-Hill, 1993.

MLA-viite (9. p.)

Spencer, Lyle M. Competence at Work. 11th. McGraw-Hill, 1993.