Gross, Martin
Quintessence Publishing, 2015
Buku Teks
Thomson, Hamish
Wright , 1990
Buku Teks
Speser, Phyllis L.
John Wiley & Sons, 2006
Buku Teks
Lyman, Michael D.
Pearson/Prentice Hall, 2005
Buku Teks
Riehl-Sisca, Joan
Appleton-Century-Crofts, 1985
Buku Teks