Writer's Digest Bokks, 1994
Buku Teks
Lederer, William J
W W Norton, 1954
Koleksi Publik
Vidya Dwina Paramita, author
Universitas Indonesia, 2009
UI - Skripsi (Open)
Hartman, Charles O., 1949-, author
Wiley Blackwell, 2015
Buku Teks
Arnold, George T., author
McGrawHill, 1996
Buku Referensi