Notes
--- workbook/Jack C. Richards, Chuck Sandy.- 2nd ed.- [Tabriz]: Khorvash, 2009=1388 , iv, 72p.: ill. , Originally published: Cambridge: cambridge university, c2008 , .....Teacherיs manual / Jack C. Richards, Chuck Sandy, [Tabriz]: Khorvash, 1998=1384 , Originally published: Cambridge: cambridge university, 1998 , xvi, 286p
