O`Connor, J.D..
Phonetic Drill Reader / - 1st ed / - Cambridge : Canbridge University press. - p.59 :
0-521-08582-9
P111:1 / L3O
Phonetic Drill Reader / - 1st ed / - Cambridge : Canbridge University press. - p.59 :
0-521-08582-9
P111:1 / L3O