MLA

Kerstens, Johan G. The Syntax of Number, Person and Gender : a Theory of Phi-features. Berlin: Mouton de Gruyter, 1993.

APA

Kerstens, J. G. (1993). The syntax of number, person and gender : a theory of phi-features. Berlin: Mouton de Gruyter.

Chicago

Kerstens, Johan G., The Syntax of Number, Person and Gender : a Theory of Phi-Features. Berlin: Mouton de Gruyter, 1993.