APA-referens (7:e uppl.)
ebrary, Inc, Balducchi, D. E., Eberts, R. W., & O'Leary, C. J. (2004). Labor exchange policy in the United States. W.E. Upjohn Institute for Employment Research.
Chicago-referens (17:e uppl.)
ebrary, Inc, David E. Balducchi, Randall W. Eberts, och Christopher J. O'Leary. Labor Exchange Policy in the United States. Kalamazoo, Mich.: W.E. Upjohn Institute for Employment Research, 2004.
MLA-referens (9:e uppl.)
ebrary, Inc, et al. Labor Exchange Policy in the United States. W.E. Upjohn Institute for Employment Research, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.