Edwards, Perry, author
Wadsworth, 1979
Buku Teks SO
Khan, Emdad H., author
Oxford & IBH Publishing, 1987
Buku Teks
Mandell, Steven L., author
West Publishing Company, 1982
Buku Referensi
Mandell, Steven L., author
West Publishing Company, 1982
Buku Teks SO
Mandell, Steven L., author
West Publishing, 1983
Buku Teks SO