3. 100 putonghua situations: practical Chinese conversations = 普通话情景会话100 Wang, Peggy. Hong Kong : Commercial Press, [2006] IFYP004
4. A practical Chinese grammar Cheung, Hung-nin Samuel, 1946- Hong Kong : Chinese University Press, c1994. IFYP004
5. Colloquial Cantonese and Putonghua equivalents Zeng, Zifan. Hong Kong : Joint Publ. Co., 1986. IFYP004