Taglianonte, Sali A.
Variationist sociolinguistics : change, observation, interpretation
Wiley-Blackwell, 2012
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Howells, William D.
Mankind in the making : the story of human evolution
Doubleday, 1967
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Clarke, Arthur C.
The making of a moon, the story of the earth satellite program.
Harper, 1957
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Issues in sociolinguistics
edited by Oscar Uribe-Villegas
Mouton, 1977
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Wardhaugh, Ronald
An Introduction to Sociolinguistics
Blackwell Publishers, 2002
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