D.C., E., L., S., W.(1967).Drills and Exercises in English Pronounciation : Stress and Intonation, Part 2 .New York:Macmillan Publishing Co., Inc..
Gaya MLA
D.C., English, Language, Services,, Washington."Drills and Exercises in English Pronounciation : Stress and Intonation, Part 2".New York:Macmillan Publishing Co., Inc.,1967.Textbook.