Goldman, Stephen H.
Houghton Miffiln, 1986
Buku Teks SO
Spaventa, Lou J.
McGraw-Hill, 2001
Buku Teks SO
Day, Susan
McGraw-Hill, 1988
Buku Teks SO
Gillespie, Sheena
Scott, Foresman, 1986
Buku Teks SO
edited by X.J. Kennedy and Dorothy M. Kennedy
St. Martin`s Press, 1985
Buku Teks SO