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} }