Virkler, H. A. (1991). Speaking your mind without stepping on toes: Guidelines for group leaders included. Victor.
Chicago-referens (17:e uppl.)Virkler, Henry A. Speaking Your Mind Without Stepping on Toes: Guidelines for Group Leaders Included. New York: Victor, 1991.
MLA-referens (9:e uppl.)Virkler, Henry A. Speaking Your Mind Without Stepping on Toes: Guidelines for Group Leaders Included. Victor, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.