MLA

Ramat, Anna Giacalone, and Paolo Ramat. The Indo-european Languages. London, New York: Routledge, 1998.

APA

Ramat, A. Giacalone, & Ramat, P. (1998). The Indo-European languages. London, New York: Routledge.

Chicago

Ramat, Anna Giacalone, ed., and Paolo Ramat ed. The Indo-European Languages. London, New York: Routledge, 1998.