Cook, P. J., & Frank, R. H. The economic payoff of attending an Ivy-League institution: Philip J. Cook. Robert H. Frank. Critical white studies : looking behind the mirror.(1997).

Cook, Philip J., and Robert H. Frank. "The Economic Payoff of Attending an Ivy-League Institution: Philip J. Cook. Robert H. Frank." Critical White Studies : Looking Behind the Mirror.(1997) .

Cook, Philip J., and Robert H. Frank. "The Economic Payoff of Attending an Ivy-League Institution: Philip J. Cook. Robert H. Frank." Critical White Studies : Looking Behind the Mirror.(1997), .