Stewart, F.S., author
English Language Book Society, 1977
Buku Teks
Hare, Ronald, author
Longman, 1967
Buku Teks
Hare, Ronald, author
Churchill, 1979
Buku Teks
Rhodes, A. J.
The Williams & Willkins, 1958
Buku Teks
Jeffrey I. Cohen, Diane e. Griffin, Robert A. Lamb, Malcom a. Martin. Vincent R. Racaniello, Bernard Roizman
Wolters Kluwer, 2013
Buku Teks