Murdock, George Peter, author
McGraw-Hill, 1959
Buku Teks
edited by Phillis M. Martin and Patrick O'Meara
Indiana University Press, 1995
Buku Teks
Frederick A. Praeger, 1964
Buku Teks
Murray, Rachel, author
Cambridge University Press, 2004
Buku Teks
Robertson, Hector Menteith, author
Cambridge University Press, 1957
Buku Teks