LEVY, D., LEE, D., LEE, H. (., Kauffman, R. J., & Bergen, M. (2011). Price Points and Price Rigidity. Institutional Knowledge at Singapore Management University.

LEVY, Daniel, Dongwon LEE, Haipeng (Allen) LEE, Robert J. Kauffman, و Mark Bergen. Price Points and Price Rigidity. Institutional Knowledge at Singapore Management University, 2011.

LEVY, Daniel, et al. Price Points and Price Rigidity. Institutional Knowledge at Singapore Management University, 2011.