Oldenbourg, Zoe
Pantheon Books, 1966
Buku Teks
Amstrong, Karen, author
Serambi Ilmu Semesta, 2004
Buku Teks
Armstrong, Karen, author
Doubleday, 1991
Buku Teks
Oldenbourg, Zoe
Pantheon Books, 1971
Buku Teks
Phillips, Charles, author
Southwater, 2011
Buku Referensi