Introduction to SociolinguisticsRonald Wardhaugh · First published 1986 · Latest edition 1997Open the Tome
English for a Changing World Level 1 Listening Comprehension ManualRonald Wardhaugh · First published 1984Open the Tome
English for a Changing World Level 1 Student BookRonald Wardhaugh · First published 1984Open the Tome
English for a Changing World Level 4 Listening Comprehension ManualRonald Wardhaugh · First published 1984Open the Tome