Sura, D. (). Art of writing business letters. India: Sundararajan.

[1] https://www.thebalancecareers.com/how-to-format-a-business-letter-2062540

[1] https://www.indeed.com/career-advice/career-development/business-letter-format-and-example

[1] https://site.uit.no/english/writing-style/letters/

[1] Adapted from https://www.indeed.com/career-advice/career-development/business-letter-format-and-example

Adopted from : https://www.thebalancecareers.com/how-to-format-a-business-letter-2062540