Essentials of risk management / George L. Head ; Stephen Horn II. (2010). Malvern, PA: American Institute for Chartered Property Casualty Underwriters/Insurance Institute of America, c.
Essentials of risk management / George L. Head ; Stephen Horn II. 3rd ed.. Malvern, PA: American Institute for Chartered Property Casualty Underwriters/Insurance Institute of America, c, 2010. Buku Wajib.