question mark

Type(s) of

Sources

• PEI & GAYNOR 1954 105 (interrogation point), 181

  PEI, Mario A. & GAYNOR, Frank. (1954) A Dictionary of Linguistics. New York : Philosophical Library.

• MATTHEWS 1997 306

  MATTHEWS, P.H. (1997) The Concise Oxford Dictionary of Linguistics. Oxford: Oxford University Press.