Cita APA (7a ed.)

Kümmel, P. (1979). Formalization of natural languages. Spring-Verlag.

Cita Chicago Style (17a ed.)

Kümmel, Peter. Formalization of Natural Languages. Berlín: Spring-Verlag, 1979.

Cita MLA (8a ed.)

Kümmel, Peter. Formalization of Natural Languages. Spring-Verlag, 1979.