Hopper, P. J., & Traugott, E. C. (2008). Grammaticalization (2. ed., 4 print.). Cambridge Univ. Press.
Chicago Style (17th ed.) CitationHopper, Paul J., and Elizabeth Closs Traugott. Grammaticalization. 2. ed., 4 print. Cambridge [u.a.]: Cambridge Univ. Press, 2008.
MLA (9th ed.) CitationHopper, Paul J., and Elizabeth Closs Traugott. Grammaticalization. 2. ed., 4 print. Cambridge Univ. Press, 2008.
Warning: These citations may not always be 100% accurate.