Cita APA (7a ed.)

Jaeggli, O., & Safir, K. J. (1989). The null subject parameter. Kluwer Academic.

Cita Chicago Style (17a ed.)

Jaeggli, Osvaldo, y Kenneth J. Safir. The Null Subject Parameter. Dordrecht [etc.]: Kluwer Academic, 1989.

Cita MLA (9a ed.)

Jaeggli, Osvaldo, y Kenneth J. Safir. The Null Subject Parameter. Kluwer Academic, 1989.