Hill, E. Spot's First Walk. G. P. Putnam's Sons.
Cita Chicago (17th ed.)Hill, Eric. Spot's First Walk. G. P. Putnam's Sons.
Cita MLA (8th ed.)Hill, Eric. Spot's First Walk. G. P. Putnam's Sons.
Atenció: Aquestes cites poden no estar 100% correctes.