McGraw-Hill, 1973
Buku Teks
Burton R. Clark, Guy R. Neave, editors-in-cheif
Pergamon Press, 1992
Buku Referensi
Burton R. Clark, Guy R. Neave, editors-in-chief
Pergamon Press, 1992
Buku Referensi
Hodgkinson, Harold L.
McGraw-Hill , 1971
Buku Teks
Jossey-Bass , 1975
Buku Teks