Frederick A. Praeger, 1964
Buku Teks
Fitzgerald, Walter, author
Methuen, 1952
Buku Teks
Edited by Heike Krieger, Assist editor Jan Willms
Cambridge University Press, 2015
Buku Teks
Nielsen, Waldemar A., author
Atheneum, 1966
Buku Teks
edited by C. Grove Haines
John Hopkins Press, 1956
Buku Teks