Quirk, Randolph
English Language Book Society/Longman, 1989
Buku Teks
Fernald, James Champlin
Barnes & Noble Books, 1963.
Buku Teks
Ehrlich, Eugene, author
Erlangga, 2004
Buku Teks
Fontaine, Lise, editor
[Cambridge University Press;;, ], 2013
eBooks
Dhanny R. Cyssco, author
Puspa Swara, 2004
Buku Teks