Muller, Herbert J.
Oxford University Press , 1953
Buku Teks
Feith, Herbert
N.Y. Cornell University , 1957
Buku Teks
Conover, Herbert S.
McGraw-Hill, 1977
Buku Teks
Alexander, Herbert E.
Burgess Publishing Company, 1972
Buku Teks
Feis, Herbert
W.W. Norton, 1967
Buku Teks