Of the Following Citations from a Bibliography, Only One Conforms

Of the following citations from a bibliography, only one conforms to the author-date system of referencing.Which one is it?

A) Wardhaugh, R. 1985, How conversation works, Basil Blackwell, New York.
B) West, C. 'Routine complications: troubles between doctors and patients'. Bloomington: Indiana University Press, 1984
C) Thomas Kochman, 1981. Black and White Styles in Conflict (Chicago: University of Chicago Press)
D) Ong, Walter. Orality and literacy, 1982
E) Bryant, Pauline. Regional Variation in the Australian English Lexicon, 'Australian Journal of Linguistics', vol 5, pp. 55-66, 1989.