Voorhis, Jerry
Harper & Row, 1961
Buku Teks
Graves, Robert, author
New York Jonathan Cape & Harrison Smith 1930
Buku Teks
Poulter, Alan, author
Library Association Publishing, 2000
Buku Referensi
edited by Forbes Gibb
Taylor Graham , 1986
Buku Teks
Yun, Hyon-gyong, author
Samsung Chulpansa, 2012
Buku Teks