Stead, David G., author
Angus and Robertson, 1963
Buku Teks
Allchin, Bridget
Penguin Books, 1968
Buku Teks
Cindy Melody, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2013
UI - Skripsi (Membership)
Spear, Percival, author
The University of Michigan Press, 1961
Buku Teks
Buku Teks