APA

Turnbull j., Bull v., Phillips p., Shovel m. & Venning H. (2006). Oxford wordpower trainer. New york, USA: Oxford university press.

Chicago

Turnbull jonna, Bull victoria, Phillips patrick, Shovel martin and Venning Harry. 2006. Oxford wordpower trainer. New york, USA: Oxford university press.

Harvard

Turnbull j., Bull v., Phillips p., Shovel m. and Venning H. (2006). Oxford wordpower trainer. New york, USA: Oxford university press.

MLA

Turnbull jonna, Bull victoria, Phillips patrick, Shovel martin and Venning Harry. Oxford wordpower trainer. New york, USA: Oxford university press. 2006.