Racine EF, Frick KD, Strobino D., Carpenter LM, Milligan R., Pugh L.How motivation influences breastfeeding duration among low-income women. J Hum Lact. 2009;25:173-181.
2.
Deci E., Ryan RMIntrinsic Motivation and Self Determination inHuman Behaviour: Perspectives in Social Psychology. New York: Plenum; 1985.
3.
Shah JY, Kruglanski AWThe structure and substance of intrinsic motivation. In: Sansone C, Harackiewicz JM , eds. Intrinsic and Extrinsic Motivation: The Search for Optimal Motivation and Performance. New York: Academic Press;2000:105-129.
4.
Avery M., Duckett L., Dodgson J., Savik K., Henly SJFactors associated with very early weaning among primparas intending to breastfeed . Maternal Child Health J. 1998;2:167-179.
5.
Bolling K., Grant C., Hamlyn B., Thorton A.Infant Feeding Survey 2005. London: The Information Centre UK; 2007.
6.
Sansone C., Harackiewicz JMIntrinsic and Extrinsic Motivation: The Search for Optimal Motivation and Performance. New York: Academic Press; 2000.
7.
Hidi S., Harackiewicz JMMotivating the academically unmotivated: a critical issue for the 21st century . Rev Educ Res. 2000;70:51-179.