Cita APA (7a ed.)

Bomhard, A. R., & Hopper, P. J. (1984). Toward proto-nostratic: A new approach to the comparison of proto-Indo-European and proto-Afroasiatic. Benjamins.

Cita Chicago Style (17a ed.)

Bomhard, Allan R., y Paul J. Hopper. Toward Proto-nostratic: A New Approach to the Comparison of Proto-Indo-European and Proto-Afroasiatic. Amsterdam [etc.]: Benjamins, 1984.

Cita MLA (9a ed.)

Bomhard, Allan R., y Paul J. Hopper. Toward Proto-nostratic: A New Approach to the Comparison of Proto-Indo-European and Proto-Afroasiatic. Benjamins, 1984.