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
Axtell, Roger E.
Dos and taboos of using English around the world / Roger E. Axtell
John Wiley & Sons, 1995
 Buku Teks SO
Baker, Ann
Introducing English pronunciation : a teacher's guide to Tree or Three? and Ship or Sheep?
Cambridge University Press, 1982
 Buku Teks