McNair, Malcolm P., author
McGraw-Hill, 1956
Buku Teks
Newman, Donald G.
John Wiley & Sons, 1978
Buku Teks
Bridson, Gavin D.R.
Gerland Publishing, Inc., 1994
Buku Teks
Patai, Raphael
Hraf Press , 1957
Buku Teks
Salmon, Claudine, author
Editions de la Maison des sciences de l'homme, 1981
Buku Referensi