Wasir, H.S
Silverdale Books, 2001
Buku Teks SO
Wasir, H.S
Silverdale Books, 2001
Buku Teks SO
Simon, Harvey B
Little, Brown and Company, 1994
Buku Teks SO
McDougall, John A
Plume, 1998
Buku Teks SO
Barry L. Zaret, Marvin Moser, Lawrence S. Cohen, Genell J. Subak-Sharpe
Hearst Book, 1992
Buku Teks SO