Research methods in language policy and planning : a practical guide
edited by Francis M. Hult and David Cassels Johnson
Wiley Blackwell, 2015
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McNeill, Patrick
Research methods
Routledge, 1990
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McNeill, Patrick
Research methods
Routledge, 1999
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White, Theresa L.
Research methods
Wadsworth and Cengage Learning, 2013
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Leavitt, Fred
Research methods for behavioral scientists
C. Brown Publishers , 1991
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