APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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