Blackwell, A., Naber, T., & Manin, G. J. (2004). English knowhow. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Blackwell, Angela, Therese Naber, agus Gregory J. Manin. English Knowhow. New York: Oxford University Press, 2004.
Lua MLA (8ú heag.)Blackwell, Angela, et al. English Knowhow. Oxford University Press, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.