Bynagle, Hans E.
Philosophy : a guide to the reference literature / Hans E. Bynagle
Libraries Unlimited, 1986
 Buku Referensi
Lauterbach, Richard E.
These are the Russians / Richard E. Lauterbach
Harper & Brother Publishers, 1945
 Buku Teks
Torrey, Theodore W.
Morphogenesis of the vertebrates
John Wiley & Sons, 1979
 Buku Teks
Gutzwiller, Kathryn J.
A guide to hellenistic literature
Blackwell, 2007
 Buku Teks
Bateson, FW
Guide to English literature
Longmans , 1965
 Buku Teks