Hill, L. (1992). Word Power 3000: Vocabulary Tests and Exercises in American English. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoHill, L.a. Word Power 3000: Vocabulary Tests and Exercises in American English. Oxford: Oxford University Press, 1992.
MLA CitationHill, L.a. Word Power 3000: Vocabulary Tests and Exercises in American English. Oxford: Oxford University Press, 1992.
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