Knapp, B.J., author
George Allen and Unwin, 1982
Buku Teks
Prothero, Donald R., author
McGraw-Hill, 2010
Buku Teks
Volkov, A., author
Foreign Languages Publishing House, [date of publication not identified]
Buku Teks
Miller, Austin
Methuen, {s.a}
Buku Teks
Hay, Sara Henderson, author
Doubleday, 1966
Buku Teks