Cooper, H. (1997). The baby who wouldn't go to bed. Random House Children's Books.
Cita Chicago (17th ed.)Cooper, Helen. The Baby Who Wouldn't Go to Bed. London: Random House Children's Books, 1997.
Cita MLA (9th ed.)Cooper, Helen. The Baby Who Wouldn't Go to Bed. Random House Children's Books, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.