Hawkins, Paula, author
Doubleday, 2017
Buku Teks
Hawkins, Paula, author
Noura Books, 2017
Buku Teks
Dabai Kequanshu Chubanshe, 1998
Buku Referensi
Brakman, Willem
EM. Querido's Uitgeverij N.V, 1965
Buku Teks
editor, Ronald Hamowy
Sage Publications, 2008
Buku Referensi