APA-referens (7:e uppl.)
WRIGHT, S., & ASHMAN, A. (1992). THE USE OF SYMBOLS IN DRAWINGS BY CHILDREN, NONDISABLED ADULTS AND ADULTS WITH AN INTELLECTUAL DISABILITY.
Chicago-referens (17:e uppl.)
WRIGHT, S.K, och A.F ASHMAN. THE USE OF SYMBOLS IN DRAWINGS BY CHILDREN, NONDISABLED ADULTS AND ADULTS WITH AN INTELLECTUAL DISABILITY. 1992.
MLA-referens (9:e uppl.)
WRIGHT, S.K, och A.F ASHMAN. THE USE OF SYMBOLS IN DRAWINGS BY CHILDREN, NONDISABLED ADULTS AND ADULTS WITH AN INTELLECTUAL DISABILITY. 1992.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.