Cita APA (7a ed.)

Steves, R. (2004). Spain and Portugal: 2004. Group West.

Cita Chicago Style (17a ed.)

Steves, Rick. Spain and Portugal: 2004. Estats Units: Group West, 2004.

Cita MLA (9a ed.)

Steves, Rick. Spain and Portugal: 2004. Group West, 2004.