Clyde F. Coombs
McGraw-Hill, 2001
Buku Teks
Clyde F. Coombs, editor-in-chief
McGraw-Hill, 2001
Buku Referensi
Clyde F. Coombs, editor-in-chief
McGraw-Hill, 1979
Buku Referensi
Ginsberg, Gerald L., author
McGraw-Hill, 1990
Buku Teks
editor-in-chief, Wai-Kai Chen
CRC Press, 1995
Buku Referensi