Laird, Charlton Grant, 1901-
A Fawcett Premier Book, 1966
Buku Teks
Laird, Charlton Grant, 1901-
Fawcett World Library, 1957
Buku Teks
Bloomfield, Leonard, author
Holt, Rinehart and Winston, 1961
Buku Teks
Beard, Adrian, author
Routledge, 2004
Buku Teks
Klein, Wolfgang
Routledge , 1997
Buku Teks