Gilmore, Gene
Body & Fraser Publishing Company, 1997
Buku Teks
Baskette, Floyd K.
Macmillan, 1982
Buku Teks
Sharpe, Leslie T.
Camberidge University Press , 1994
Buku Teks
Camp, Sue C.
Glencoe/McGraw-Hill, 2001
Buku Teks
Compesi, Ronald J.
Allyn and Bacon, 1994
Buku Teks