A. . Kapoor, N. A. . Zuberi, and M. . Baig, “Comparison Of Vitamin B12 Level Among Vegetarian And Non Vegetarian Apparently Healthy Individuals In District Tharparkar”, J. Bahria Univ. Med. Dent. Coll., vol. 2, no. 1, pp. 13–16, Jan. 2012.