Lazarus, Harold
The process of management/ Harold Lazarus
Prentice-Hall, 1968
 Buku Teks
West, Morris
Lazarus
Mandarin, 1990
 Buku Teks SO
Collin, P. H.
Dictionary of business
Peter Collin Publishing, 2001
 Buku Teks
Faulkner, Harold Underwood
History of the American way / Harold Underwood Faulkner
Harper , 1950
 Buku Teks SO
Plano, Jack C.
The American political dictionary
Holt, Rinehart and Winston, 1985
 Buku Referensi