Haberland, Hartmut and Macrakis, Stavros. 1992. Sum: Yes/No Gestures. online. (in LINGUIST List 3.1012, Wed 23 Dec 1992).
@misc{Haberland-and-Macrakis-1992, author = {Haberland, Hartmut and Macrakis, Stavros}, howpublished = {online}, note = {in LINGUIST List 3.1012, Wed 23 Dec 1992}, title = {Sum: Yes/No Gestures}, url = {http://www.linguistlist.org/issues/3/3-1012.html}, year = {1992}, iso_code = {ell}, olac_field = {general_linguistics; typology}, wals_code = {grk} }