Cita APA (7th ed.)

Arenas, A., Dong, J., Martin, A., & Matthews, B. (2006). Preface.

Cita Chicago (17th ed.)

Arenas, A., J. Dong, A. Martin, i B. Matthews. Preface. 2006.

Cita MLA (9th ed.)

Arenas, A., et al. Preface. 2006.