2 BOOKS ABOUT TURKISH-ISLAMIC STATES BEFORE OTTOMAN EMPIRE (ENGLISH)

Claude Cahen, The Formation of Turkey, The Seljukid Sultanate of Rūm: Eleventh to Fourteenth Century, Longman, Pearson Education, 2001 (1.Baskı)
İbrahim Kafesoğlu, Hakkı Dursun Yıldız, Erdoğan Merçil, Mehmet Saray, A Short History of Turkish-Islamic States (Excluding the Ottoman State), Translated by Ahmet Edip Uysal, Turkish Historical Society Printing House, Ankara, 1994