Cita APA

Field, H. J., & Johnson, A. P. (2010). Preface. Oxford University Press.

Chicago Style Citation

Field, Hugh J., i Alan P. Johnson. Preface. Oxford University Press, 2010.

Cita MLA

Field, Hugh J., i Alan P. Johnson. Preface. Oxford University Press, 2010.

Atenció: Aquestes cites poden no estar 100% correctes.