Swan, M. (2009). How english works: A grammar practice book with answers. Oxford: Oxford University Press.
استشهاد بنمط شيكاغوSwan, Micheal. How English Works: A Grammar Practice Book With Answers. Oxford: Oxford University Press, 2009.
MLA استشهادSwan, Micheal. How English Works: A Grammar Practice Book With Answers. Oxford: Oxford University Press, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.