APA Style
      Teaching by principles : an interactive approach to language pedagogy. (1994).
    Englewood Cliffs ; NJ:
  Prentice Hall Regents & Center for Applied Linguistic.
  
MLA Style
      Teaching by principles : an interactive approach to language pedagogy.
    .
    Englewood Cliffs ; NJ:
  Prentice Hall Regents & Center for Applied Linguistic,
  1994.
  Text.