Houghton Mifflin, 1967
Buku Teks
Knapp, B.J.
George Allen and Unwin, 1982
Buku Teks
Prothero, Donald R.
McGraw-Hill, 2010
Buku Teks
Volkov, A.
Foreign Languages Publishing House, [date of publication not identified]
Buku Teks
Miller, Austin
Methuen, {s.a}
Buku Teks