Pickering, Wilbur. 1971. Apuriña Grammar. (Arquivo Lingüístico, 8.) Brasilia: Summer Institute of Linguistics.
@book{Pickering-1971,
address = {Brasilia},
author = {Pickering, Wilbur},
publisher = {Summer Institute of Linguistics},
series = {Arquivo Lingüístico},
title = {Apuriña Grammar},
volume = {8},
year = {1971}
}