Snider, H. Wayne
Ill. Irwin , 1959
Buku Teks
Brown, Robert L.
ACTEX Publications, Inc, 2015
Buku Teks
Kenney, Roger
The Kenney Insurance Studies, 1967
Buku Teks
Donaldson, James H.
Richard D. Irwin, Inc., 1968
Buku Teks
Elliot, Curtis M
McGraw-Hill, 1960
Buku Teks