Hägg, U. (1980). The pubertal growth spurt and maturity indicators of dental, skeletal and pubertal development: A prospective longitudinal study of Swedish urban children. [s.n.].
Chicago-referens (17:e uppl.)Hägg, Urban. The Pubertal Growth Spurt and Maturity Indicators of Dental, Skeletal and Pubertal Development: A Prospective Longitudinal Study of Swedish Urban Children. Malmö: [s.n.], 1980.
MLA-referens (8:e uppl.)Hägg, Urban. The Pubertal Growth Spurt and Maturity Indicators of Dental, Skeletal and Pubertal Development: A Prospective Longitudinal Study of Swedish Urban Children. [s.n.], 1980.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.