Field, a.E., Camargo, Jr., C.A., Taylor, C.B., Berkey, C.S., Colditz, G.A. (1999). Relation of peer and media influences to the development of purging behaviors among preadolescent and adolescent girls. Archives of Pediatric & Adolescent Medicine, 153(11), 1184-1189.
Gerhard, T. (2008). Bias: Considerations for research practice. American Journal of Health-System Pharmacy, 65(22), 2159-2168.
Miller, K.D., Rahman, Z.U., Sledge, Jr., G.W. (2001). Selection bias in clinical trials. Breast Disease, 14(1), 31-40.
Winship, C.W., and Mare, R.D. (1992). Models for sample selection bias. Annual Review of Sociology, 18(1), 327-350.