Lessons 13–14 · 2 lessons · T. O‘. Salimov, F. E. Sultonov. Jahon tarixi (milodiy V asr oxiridan – XV asr oxirigacha) (World history, late 5th – late 15th century), Grade 7. «O‘zbekiston milliy ensiklopediyasi» State Scientific Publishing House, Tashkent, 2017 (revised and expanded 3rd edition)