Day, P. (2009). What is friendship?: Games and activities to help children to understand friendship. Jessica Kingsley Publishers.
Chicago-Zitierstil (17. Ausg.)Day, Pamela. What Is Friendship?: Games and Activities to Help Children to Understand Friendship. London: Jessica Kingsley Publishers, 2009.
MLA-Zitierstil (9. Ausg.)Day, Pamela. What Is Friendship?: Games and Activities to Help Children to Understand Friendship. Jessica Kingsley Publishers, 2009.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.