Wright, Charles Robert, author
Ramaja Karya, 1986
Buku Teks
Wright, Charles Robert, author
Random House, 1975
Buku Teks
Wright, Charles Robert, author
New York, N.Y. Random House 1966,
Buku Teks
Vivian, John, author
Kencana Prenada Media, 2008
Buku Teks
Benson, Leonard, author
Random House , 1968
Buku Teks