Fairclough, Norman, author
Longman, 1997
Buku Teks
Lumempouw, Rudyard Adlin Riswan, author
Fakultas Ekonomi Universitas Indonesia, 1987
UI - Skripsi (Membership)
Fishman, George S., author
John Wiley & Sons, 1993
Buku Teks
Wagenmakers, Joop
Prentice-Hall, 1991
Buku Teks
Wanhill, Russel, author
Springer Nature, 2019
eBooks