Gabriel, Ralph Henry, 1890-1987, author
D. Appleton-Century, 1942
Buku Teks
Mason, Stephen S., author
Henry Schuman, 1953
Buku Teks
Leahey, Thomas Hardy, author
Prentice-Hall, 1997
Buku Teks
Quint, Howard H
Dorsey Press, 1968
Buku Teks
Aron, Raymond, author
Basic Books, 1965
Buku Teks