BIBLIOGRAPHY

https://www.collinsdictionary.com/ 

https://dictionary.cambridge.org/us/

https://www.ldoceonline.com/

https://www.britannica.com/topic/The-Oxford-English-Dictionary

https://federalstreetpress.com/publication/websters-american-english-dictionary-0/

https://www.oxfordonlineenglish.com/free-english-grammar-lessons

http://www.visualdictionaryonline.com/index.php

https://www.learngrammar.net/english-grammar