Greer, Nora Richter, author
Rockport Publishers, 1998
Buku Teks
Testa, Matteo, author
Springer Singapore, 2019
eBooks
Balloffet, Nelly, author
[American Library association, ], 2005
eBooks
Gundevia, Y. D.
Distributed by Orient Longman, 1984
Buku Teks
Polish Academy of Sciences, 2008
Majalah, Jurnal, Buletin