APA

Richards J. C., Bohlke D., . (2012). Speak Now 3. Oxford: Oxford University Press.

Chicago

Richards J C, Bohlke D, . 2012. Speak Now 3. Oxford: Oxford University Press.

Harvard

Richards J. C., Bohlke D., . (2012). Speak Now 3. Oxford: Oxford University Press.

MLA

Richards J C, Bohlke D, . Speak Now 3. Oxford: Oxford University Press. 2012.