Kerstens, J. (1993). The syntax of number, person and gender: A theory of phi-features. Mouton De Gruyter.
Lua i Stíl Chicago (17ú heag.)Kerstens, Johan. The Syntax of Number, Person and Gender: A Theory of Phi-features. Berlin ; New York: Mouton De Gruyter, 1993.
Lua MLA (9ú heag.)Kerstens, Johan. The Syntax of Number, Person and Gender: A Theory of Phi-features. Mouton De Gruyter, 1993.
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