Heine, Bernd. 1993. Auxiliaries: Cognitive Forces and Grammaticalization. New York: Oxford University Press.
@book{Heine-1993, address = {New York}, author = {Heine, Bernd}, publisher = {Oxford University Press}, title = {Auxiliaries: Cognitive Forces and Grammaticalization}, year = {1993}, iso_code = {ikx}, olac_field = {syntax; typology; general_linguistics}, wals_code = {ik} }