McQuaill, Denis
Longman, 1984
Buku Teks
Guttman, Irwin, author
John Wiley & Sons, 1982
Buku Teks
Searle, S.R. (Shayle R.), 1928-, author
Wiley, 2017
Buku Teks
Tsischitzis, Dionysios C., author
Prentice-Hall, 1982
Buku Teks
Ahuja, Narendra, author
North Holland, 1983
Buku Teks