Butwell, Richard
Frederick A. Praeger, 1962
Buku Teks
Butwell, Richard
Praeger, 1961
Buku Teks
Kantner, John F.
Lixington Books, 1975
Buku Teks
edited by John F. Kantner, Lee McCaffrey
Lexington Books, 1975
Buku Referensi
edited by Nancy Chng
Select Books, 1977
Buku Teks