APA-Zitierstil (7. Ausg.)

Penny, R. J. (2004). Variation and change in Spanish (1. paperback ed.). Cambridge Univ. Press.

Chicago-Zitierstil (17. Ausg.)

Penny, Ralph J. Variation and Change in Spanish. 1. paperback ed. Cambridge [u.a.]: Cambridge Univ. Press, 2004.

MLA-Zitierstil (9. Ausg.)

Penny, Ralph J. Variation and Change in Spanish. 1. paperback ed. Cambridge Univ. Press, 2004.