Lane, Frederick S.
Martin's Press Inc., 1980
Buku Teks
Bingham, Richard D., author
McGraw-Hill, 1991
Buku Teks
Holloway, William Vernon, author
McGraw-Hill , 1951
Buku Teks
Lancaster, Lane W.
Van Nostrand , 1952
Buku Teks
edited by Herbert L. Marx
H.W. Wilson, 1962
Buku Teks