Boenisch, author
Grasindo, 2004
Buku Teks
edited by Shirley Fisher and James Reason
John Wiley & Sons, 1988
Buku Referensi
Whiteman, Thomas, author
Zondervan, 1996
Buku Teks
Selye, Hans
McGraw-Hill , 1976
Buku Teks
Domar, Alice D., author
Henry Holt and Company, 1996
Buku Teks