Cita APA (7a ed.)

Chappell, P., & Wetz, B. (2004). Steps to success: [llengua anglesa] : 1 : teacher's guide : [bachillerato]. Oxford University.

Cita Chicago Style (17a ed.)

Chappell, Pat, y Ben Wetz. Steps to Success: [llengua Anglesa] : 1 : Teacher's Guide : [bachillerato]. Oxford ; Madrid: Oxford University, 2004.

Cita MLA (9a ed.)

Chappell, Pat, y Ben Wetz. Steps to Success: [llengua Anglesa] : 1 : Teacher's Guide : [bachillerato]. Oxford University, 2004.