Asrat M, Zeryehun T, Amha N and Urge M 2018:  
Effects of supplementation of different levels of garlic (Allium sativum) on egg production, egg quality and hatchability of White Leghorn chicken. 
 Livestock Research for Rural Development. Volume 30, Article #37. 
 Retrieved 
, from http://www.lrrd.org/lrrd30/3/tesf30037.html