Cita APA (7a ed.)

Olbertz, H. (1996). Verbal periphrases in a functional grammar of spanish. Ponsen & Looijen.

Cita Chicago Style (17a ed.)

Olbertz, Hella. Verbal Periphrases in a Functional Grammar of Spanish. Wageningen: Ponsen & Looijen, 1996.

Cita MLA (8a ed.)

Olbertz, Hella. Verbal Periphrases in a Functional Grammar of Spanish. Ponsen & Looijen, 1996.