Hays, H.R.
From ape to angel: an informal of history of anthropology
Alfred A. Knofpf, 1958
 Buku Teks SO
Albom, Mitch, 1958-
The first phone call from heaven
HarperCollins, 2013
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Hardisty, David
Call ,
Oxford Oxford University Press 1989
 Buku Teks
Hardisty, David
Call
Oxford University Press, 1989
 Buku Teks SO
Carr, Caleb
The angel of darkness
Random House, 1997
 Buku Teks SO