Bulgakov, Mikhail, author
Everyman's Library, 1992
Buku Teks
Billings, Keith H., author
New York: Van Nostrand Reinhold, 1993,
Buku Referensi
Sheldon, Donald H., author
J. Ross Publishing, Inc., 2006
Buku Teks
Sheldon, Sidney, author
Gramedia, 2003
Buku Teks
Stevenson, Robert Louis, author
Everyman's Library, 1992
Buku Referensi