Gaya APA

Duff, P, &. (2017). 2017 Valuation Handbook U.S. Guide Cost of Capital . Canada: John Willey, & Sons, Inc..

Gaya MLA

Duff, Phelps, &. "2017 Valuation Handbook U.S. Guide Cost of Capital". Canada: John Willey, & Sons, Inc., 2017. Text.