9. Growth Hormone

10. The Clock in Our Bodies That Never Goes Wrong

11. The Miraculous Molecule That Regulates Body Temperature

12. An Extraordinarily Delicate Balance

Notes: 

9. The Illustrated Encyclopedia of The Human Body, Marshall Cavendish Books, London, 1974, p. 81.

10. Guyton & Hall, Textbook of Medical Physiology, 7th ed., W.B. Saunders, s. 1264-1275.

11. Biological Science, A Moleculer Approach BSCS Blue Version--6th ed., Colorado, 1990, p. 521.

12. Op cit, , p. 521.