Gast Volker, Bisang Walter, Hock Hans Henrich, Levshina Natalia , Narrog Heiko, Schlesewsky Matthias, Zhang Niina Ning. Trends in Linguistics. Documentation [TiLDOC]. Berlin, Boston: De Gruyter Mouton, n.d.. Web. Retrieved 21 May. 2013, from http://www.degruyter.com/view/serial/16595

Gast V. Bisang W. Hock H. Levshina N. Narrog H. Schlesewsky M. Zhang N. (n.d.). Trends in Linguistics. Documentation [TiLDOC]. Berlin, Boston: De Gruyter Mouton. Retrieved 21 May. 2013, from http://www.degruyter.com/view/serial/16595

Gast Volker, Bisang Walter, Hock Hans Henrich, Levshina Natalia , Narrog Heiko, Schlesewsky Matthias, Zhang Niina Ning. n.d. Trends in Linguistics. Documentation [TiLDOC]. Berlin, Boston: De Gruyter Mouton. Retrieved 21 May. 2013, from http://www.degruyter.com/view/serial/16595