Bruce, R. Robert
Cantonese complete course for beginners
Hodder & Stoughton, 1994
 Buku Teks
Coggle, Paul
German complete course for beginners
Teach Youeself Books, 1991
 Buku Teks SO
Sampaio, João, 1929-
Colloquial Portuguese : a complete language course
Routledge, 1995
 Buku Teks SO
Le Fleming, Svetlana
Colloquial Russian: a complete language course
Routledge, 1995
 Buku Teks SO
Sutanto Atmosumarto
Colloquial Indonesian: a complete language course
Routledge, 1994
 Buku Teks SO