APA

University of Cambridge, .Skills for effective writing 4. Cambridge : Cambridge University Press, 2013: .

Chicago

University of Cambridge, .Skills for effective writing 4. Cambridge : Cambridge University Press, 2013: .

Harvard

University of Cambridge, .Skills for effective writing 4. Cambridge : Cambridge University Press, 2013: .

MLA

University of Cambridge, .Cambridge : Cambridge University Press, 2013: . .