Hempel, Edward H., author
McGraw-Hill, 1950
Buku Teks
Bangs, John R., author
Alexander Hamilton Institute, 1955; 1961
Buku Teks
by Harold T. Amrine [and others]
Prentice-Hall, 1993
Buku Teks
Davis, Ralph Currier, author
Harper & Row, 1940
Buku Teks
Saunders, N.F.T. (Norman Frank Tilbury), author
Sir Isaac Pitman & Sons, 1946
Buku Teks