Artikel Jurnal
Colletti, Marjan, author
Ashgate Publishing Limited, 2013
Buku Teks
edited by Clare Cooper Marcus and Carolyn Francis ; drawings by Su Sin Tang and Yun Flora Yeh
John Wiley & Sons, 1998
Buku Teks
Moskow, Keith, author
McGraw-Hill, 2008
Buku Teks
Meckeler, Milton, author
McGraw-Hill, 2010
Buku Teks