Nicholson, Walter
Dryden Press , 1983
Buku Teks SO
Nicholson, Walter
Dryden Press, 1994
Buku Teks SO
Miller, Roger LeRoy
McGraw-Hill International Book, 1985
Buku Teks SO
Quirk, James P
Sciece Research Associates, 1983
Buku Teks SO
Miller, Roger LeRoy
RajaGrafindo Persada, 1994
Buku Teks SO