MLA

Ballmer, Thomas T, and Waltraud Brennenstuhl. Speech Act Classification : a Study of the Lexical Analysis of English Speech Activity Verbs. Berlin: Springer-Verlag, 1981.

APA

Ballmer, T. T, & Brennenstuhl, W. (1981). Speech act classification : a study of the lexical analysis of English speech activity verbs. Berlin: Springer-Verlag.

Chicago

Ballmer, Thomas T., and Waltraud Brennenstuhl. Speech Act Classification: A Study of the Lexical Analysis of English Speech Activity Verbs. Berlin: Springer-Verlag, 1981.