Aryana Satrya, author
Lambert Academic , 2010
Buku Teks
Sufrin, Sidney C.
Syracuse University, 1964
Buku Teks
Clegg, H. A., author
Clarendon Press, 1964
Buku Teks
Romney, Charles, author
Oxford University Press, 2016
eBooks
Griffin, Gerard
Croom Helm , 1985
Buku Teks