Cita APA (7th ed.)
ebrary, Inc, Wratil, M., & Gallmann, P. (2011). Null pronouns. De Gruyter Mouton.
Cita Chicago (17th ed.)
ebrary, Inc, Melani Wratil, i Peter Gallmann. Null Pronouns. Berlin ; Boston: De Gruyter Mouton, 2011.
Cita MLA (9th ed.)
ebrary, Inc, et al. Null Pronouns. De Gruyter Mouton, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.