O ti di ipo orisiirisii ni eka eto idajo ki won to fi je adajo agba ni osu Agemo, odun 2006, ipo yii lo feyintin si ni odun 2007.Itokasiawon ojoibi ni 1937Awon adajo ara Naijiria.. 
ISBN0-07-281718-6 ​ Scott, John & Marshall, Gordon (eds) A Dictionary of sociology (3rd ed).. 