Walker, W. Seymour. 1921. The Siwi Language. London: K. Paul, Trench, Trubner and Co.
@book{Walker-1921, address = {London}, author = {Walker, W. Seymour}, publisher = {K. Paul, Trench, Trubner and Co.}, title = {The Siwi Language}, year = {1921} }