APA
Engel B., . (2007). The Jekyll and Hyde syndrome : what to do if someone in your life has a dual personality? or if you do. Hoboken, NJ: John Wiley.
Chicago
Engel Beverly, . 2007. The Jekyll and Hyde syndrome : what to do if someone in your life has a dual personality? or if you do. Hoboken, NJ: John Wiley.
Harvard
Engel B., . (2007). The Jekyll and Hyde syndrome : what to do if someone in your life has a dual personality? or if you do. Hoboken, NJ: John Wiley.
MLA
Engel Beverly, . The Jekyll and Hyde syndrome : what to do if someone in your life has a dual personality? or if you do. Hoboken, NJ: John Wiley. 2007.