Tong, Keith S.T.
Colloquial Cantonese : a complete English course
Routledge, 1994
Buku Teks SO
Baker, Hugh D. R.
Complete Cantonese
Teach Yourself , 2015
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
Bhatia, Tej K.
Colloquial Urdu : the complete course for beginners
Routledge, 2000
Buku Teks SO