Baker, A. (1981). Ship or sheep?: An intermediate pronunciation course (2nd ed., new ed.). Cambridge University Press.
Chicago-viite (17. p.)Baker, Ann. Ship or Sheep?: An Intermediate Pronunciation Course. 2nd ed., new ed. Cambridge ; New York: Cambridge University Press, 1981.
MLA-viite (8. p.)Baker, Ann. Ship or Sheep?: An Intermediate Pronunciation Course. 2nd ed., new ed. Cambridge University Press, 1981.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.