Flippo, Edwin B., author
McGraw-Hill, 1984
Buku Teks
Bailey, Norman D., author
Physicians Record Company, 1959
Buku Teks
Heckman, I. L., author
Charles E. Merrill, 1962
Buku Teks
Schleh, Edward C., author
Prentice-Hall, 1958
Buku Teks
Flippo, Edwin B., author
McGraw-Hill Kogakusha, 1976
Buku Teks