Artikel Jurnal
Joshi, Devi Datt, author
Springer, 2012
eBooks
edited by Griffith Edwards ... [et at.]
Saxon House, 1976
Buku Teks
Hart, Carl L., author
McGraw-Hill, 2009
Buku Teks
edited by L. Guy Donaruma, Raphael M. Ottenbrite, Otto Vogl
John Wiley & Sons, 1980
Buku Teks