Jay H. Lehr, editor ; Janet K. Lehr, associate editor
McGraw-Hill, 2000
Buku Referensi
Maman Soetarman Mahayana
Universitas Indonesia, 1992
UI - Laporan Penelitian
Platt, Charles
Xanadu, 1987
Buku Teks
Broderick, Damien
Routledge, 1995
Buku Teks
Walsh, William, 1916-1996
George Allen & Unwim, 1977
Buku Teks