Kunhardt Jr, Philip B., author
Little, Brown & Co., 1989
Buku Referensi
Palacio, R. J., author
Penguin Books Ltd, 2017
Buku Teks
Evi Nurvidya Arifin, author
[publisher not identified], 2006
Buku Klasik
Basham, A.L., author
Grove Press, 1959
Buku Teks
Kyobo Book Centre, 2016
Buku Teks