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}
}