7. Quldashev N. Ekolingvistika: o‘zbek tilida til va nutq sofligining lingvokulturologik tadqiqi. Fil. fan. fal. dok... diss. avtoref. -Farg‘ona, 2021. (Kuldashev N. Ecolinguistics: linguistic and cultural study of language and speech purity in Uzbek. Phil. science. div. doc... diss. autoref. -Ferghana, 2021)

8. Ўзбек тилининг изоҳли луғати. Беш жилдлик. 1жилд. – Т., 2006. (An explanatory dictionary of the Uzbek language. -T., 2006)

4. Haugen E. The Ekology of Language // Haugen E. The Ekology of Language: essaus by Einar Haugen/Selested and Introduced by Anvar S.Dil. – Stanford, Californiya: Stanford University Press, 1972.

5. Malik T. Shaytanat 1-kitob. -Toshkent, 1994. (Malik T. Devil's place. -Tashkent, 1994)

6. Qodiriy A. Mehrobdan chayon. -Toshkent, 1994. (Kadiri A. Scorpion from Mehrab. -Tashkent, 1994)

1. I.Karimov. Yuksak ma'naviyat - yengilmas kuch. -Toshkent, 2008. (I.Karimov. High spiritualty is an invincible power. -Tashkent, 2008)

2. Dusmatov X., Mahmudova Z. Uslubshunoslik asoslari. - Farg‘ona, 2021. ( Dusmatov X., Mahmudova Z. Basics of stylistics. -Ferghana, 2021)

3. Halliday M. Current Ideas in Sustemic Praktike and Theory. – London: Pinter, 1991.