Nielsen, Waldemar A., author
Atheneum, 1966
Buku Teks
edited by Phillis M. Martin and Patrick O'Meara
Indiana University Press, 1995
Buku Teks
Witting, Amy
Penguin Books, 1989
Buku Teks
Witting, Amy
Penguin Books, 1990
Buku Teks
Wittimg, Amy
Penguin Books, 1995
Buku Teks