APA-referens (7:e uppl.)

Berry, W. D. (1984). Nonrecursive causal models. Sage Publications.

Chicago-referens (17:e uppl.)

Berry, William Dale. Nonrecursive Causal Models. Beverly Hills, Calif.: Sage Publications, 1984.

MLA-referens (8:e uppl.)

Berry, William Dale. Nonrecursive Causal Models. Sage Publications, 1984.