Costin, S. E. (1990). Friendship as a facilitator of emotional responsiveness and helping behavior in young children. [publisher not identified].
Chicago Style (17th ed.) CitationCostin, Susan Evonne. Friendship as a Facilitator of Emotional Responsiveness and Helping Behavior in Young Children. [Place of publication not identified]: [publisher not identified], 1990.
MLA (9th ed.) CitationCostin, Susan Evonne. Friendship as a Facilitator of Emotional Responsiveness and Helping Behavior in Young Children. [publisher not identified], 1990.
Warning: These citations may not always be 100% accurate.