Clark, Wilfrid E. Le Gros
Quadrangle Books, 1971
Buku Teks
Hoebel, E. Adamson
McGraw-Hill, 1966
Buku Teks SO
Linton, Ralph, 1893-1953
Appleton-Century-Crofts, 1936
Buku Teks
Titiev, Mischa
Holf, Rinehart and Winston, 1961
Buku Teks SO
Montagu, Ashley, 1905-1999
World Publishing, 1957
Buku Teks