University Press of America, 1980
Buku Teks
Thurnwald, Richard C.
George Routledge and Sons, 1935
Buku Teks
Molnos, Angela
Weltforum Verlag, 1968
Buku Teks
Rogers, Margaret
Oceana Publications Inc., 1969
Buku Teks
Macneil, Ian R.
[publisher not identified], 1966
Buku Teks