Campbell, P. S. (1998). Songs in their heads: Music and its meaning in children's lives. Oxford University Press.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিCampbell, Patricia Shehan. Songs in Their Heads: Music and Its Meaning in Children's Lives. New York: Oxford University Press, 1998.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিCampbell, Patricia Shehan. Songs in Their Heads: Music and Its Meaning in Children's Lives. Oxford University Press, 1998.
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