Tharp, Doug. 1996. Sulka Grammar Essentials. In Clifton, John M. (ed.) 42. 77-179. Ukarumpa, Papua New Guinea: Summer Institute of Linguistics. (also available online: http://www.sil.org/pacific/png/pubs/37102/Sulka_Grammar.pdf).
@inbook{Tharp-1996,
address = {Ukarumpa, Papua New Guinea},
author = {Tharp, Doug},
booktitle = {Two Non-Austronesian Grammars from the Islands},
editor = {Clifton, John M.},
note = {also available online: http://www.sil.org/pacific/png/pubs/37102/Sulka_Grammar.pdf},
pages = {77-179},
publisher = {Summer Institute of Linguistics},
series = {Data Papers on Papua New Guinea Languages},
title = {Sulka Grammar Essentials},
volume = {42},
year = {1996},
iso_code = {sua},
olac_field = {general_linguistics; morphology; typology; phonetics; phonology; syntax; semantics},
wals_code = {sul}
}