Rowley, George.
Princeton University Press, 1947
Buku Teks
American Council of Learned Societies, 1951
Buku Teks
American Council of Learned Societies, 1951
Buku Teks
tim Warsi; penyunting, Sukmareni
Elex Media Komputindo, 2012
Buku Teks
Marcucci, Luisa, author
Studio Books , 1960
Buku Referensi