Firth, Raymond, author
The New American Library, 1958
Buku Teks
Firth, Raymond, author
Thomas Nelson and Sons, 1947
Buku Teks
Firth, Raymond, author
Thomas Nelson and Sons, 1950
Buku Teks
Majumdar, D.N.
Asia Publishing House, 1960
Buku Teks
Bohannan, Paul, author
Holt, Rinehart and Winston, 1963
Buku Teks