Bickford, J. Albert. 1998. Tools for Analyzing the World’s Languages Morphology and Syntax. Summer Institute of Linguistics, Inc.

Deterding, David. H AND Poedjosoedarmo, Gloria. R. 1998. The Sounds of English. Prentice Hall. Pearson Education Asia  Pte Ltd.

Fromkin, Victoria., Rodman, Roert and Hyam, Nina. 2003. An Introduction to Language. Heinly, a part of Thomson Corporation.

Gatherer, W.A. 1986. The Student’s Handbook of Modern English. PT Gramedia, Jakarta.

Haden Elgin, Suzette. 1979. What is Linguistics? Prentice Hall, Inc. London.

Hancock, Mark. 2003. English Pronunciation in Use. Cambridge University Press.

Jones, Daniel. 1979. English Pronouncing Dictionary. J.M. Dent & Sons Ltd. London.

Lyons, John. 1996. LINGUISTIC SEMANTICS, An Introduction. Cambridge University Press.

Richards, Jack., Platt, John and Weber, Heidi. 1985. Longman Dictionary of Applied Linguistics. Longman.

Roach, Peter. 1993. English Phonetics and Phonology. Cambridge University Press

Todd, Loreto. 1987. An Introduction to Linguistics. York Press.

  1. Oxford Learner’s Pocket Dictionary. OxfordUniversity Press.

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