Menstrual Period, Late or Missed: References

Wong’s Essentials of Pediatric Nursing, 8th Edition; by Marilyn J. Hockenberry, David Wilson; Elsevier, 2008. ition.

Lippincott Manual of Nursing Practice, 9th Edition; Lippincott Williams & Wilkins; 2009

"Missed Menstrual Period: The Causes of Skipped or Late Periods (amenorrhea) on MedicineNet.com." Web. <http://www.medicinenet.com/missed_menstrual_period/symptoms.htm>.