Harris, Harry
Gadjah Mada University Press , 1994
Buku Teks
Turnpenny, Peter D
Churchill livingstone Elsevier, 2007
Buku Teks
Wyandt, Herman E.
Springer, 2011
eBooks
Pai, Anna C.
Erlangga , 1992
Buku Teks
Gardner, Eldon J.
John Wiley & Sons, 1984
Buku Teks