Hey, L.
Sie Isaac Pitman, 1972
Buku Teks
Herber, Bernard P.
Richard D. Irwin, [date of publication not identified]
Buku Teks
Due, John F.
Richard D. Irwin, Inc., 1969
Buku Teks
Hicks, Ursula K.
Kinokuniya , 1959
Buku Teks
Rosen, Harvey S.
McGraw-Hill, 2010
Buku Teks