↑ Doja, Albert. "Socializing Enchantment: A Socio-Anthropological Approach to Infant-Directed Singing, Music Education and Cultural Socialization" International Review of the Aesthetics and Sociology of Music, Vol. 45, No. 1 (June 2014), pp. 118–120.
↑ Trehub, Sandra E., Trainor, Laurel J. "Singing to infants: lullabies and and play songs" Advances in Infancy Research, (1998), pp. 43–77.
↑ I. Opie and P. Opie, The Oxford Dictionary of Nursery Rhymes (Oxford University Press, 1951, 2nd edn., 1997), p. 6.
