Cita APA (7th ed.)

Walls, C. (2011). Spring in action (3rd ed.). Manning.

Cita Chicago (17th ed.)

Walls, Craig. Spring in Action. 3rd ed. Shelter Island: Manning, 2011.

Cita MLA (8th ed.)

Walls, Craig. Spring in Action. 3rd ed. Manning, 2011.

Atenció: Aquestes cites poden no estar 100% correctes.