Ninan, Sevanti, author
Roli Books International, 1980
Buku Teks
edited by Samuel Israel, Toby Sinclair ; executive editor, Bikram Grewal
APA Productions, 1988
Buku Referensi
Artikel Jurnal
N.K. Gupta, author
Faculty of Engineering, Universitas Indonesia, 2014
Artikel Jurnal