Turney, Tully H.
Mosby, 1973
Buku Teks
Simpson, George Gaylord
Harcourt Brace & World, 1969
Buku Teks
Bailey, Paul C.
International Textbook Company, 1969
Buku Teks
Mader, Sylvia S.
McGraw-Hill , 1998
Buku Teks
Case, James F.
Macmillan, 1979
Buku Teks