Asimov, Isaac, author
Doubleday, 1964
Buku Referensi
Bocca, Geoffrey
Henry Holt , 1953
Buku Teks
editor, Catherine Stuart
Hermes House, 2015
Buku Teks
Junaidi Payne
Beaufoy Books, 2010
Buku Referensi
Dampier, William Cecil
Cambridge University Press, 1989
Buku Teks