Robertson, John, author
Hamlyn, 1990
Buku Teks
Edwards, Philip, author
British Council by Longmans, Green, 1970
Buku Teks
Elliott, Gordon R., author
Princeton University Press, 1960
Buku Teks
Christie, Agatha, 1890-1976, author
Gramedia Pustaka Utama, 2018
Buku Teks
Isaacs, Harold R.
Standford University Press, 1951
Buku Teks