by Health Insurance Association of America
Health Insurance Association of America, 1994
Buku Teks
Gregg, Davis Weiner
University of Pennsylvania by R.D. Irwin, 1962
Buku Teks
Greeg, Davis W.
Richard D. Irwin, Inc., 1960
Buku Teks
Huebner, S. S.
Appleton Century Crofts, 1972
Buku Teks
Morton, Gene A.
Fishergate, 1986
Buku Teks