McCullagh, Marie
Good practice : communication skills in english for the medical practitioner : student's book
Cambridge university press, 2008
 Buku Teks
English for specific purposes : law
disusun oleh Sofia Rangkuti-Hasibuan ; editor, Nung Atasana
Gramedia Pustaka Utama, 1992
 Buku Teks SO
English this way : teacher's manual and key to books 7-12
Macmillan, 1965
 Buku Teks SO
English this way : teacher's manual and key to books 7-12
Macmillan, 1965
 Buku Teks SO
Hutchinson, Tom, 1930-
English for specific purposes : a learning-centred approach / Tom Hutchinson and Alan Waters
Cambridge University Press , 1993
 Buku Teks