letter format - SERP Analysis

https://writing.wisc.edu/handbook/businessletter/

https://owl.purdue.edu/owl/subject_specific_writing/professional_technical_writing/basic_business_letters/index.html

https://www.grammarly.com/blog/writing-tips/how-to-write-a-formal-letter/

https://gallaudet.edu/student-success/tutorial-center/english-center/writing/how-to-write-letters/business-letter-formats-everyone-should-know/

https://www.canva.com/letters/templates/

https://www.bbc.co.uk/bitesize/articles/zkq8hbk

https://in.pinterest.com/santhini0085/letter-writing-format/

https://quillbot.com/blog/professional-writing/how-to-write-a-letter/

https://students.tippie.uiowa.edu/sites/students.tippie.uiowa.edu/files/2022-06/Business%2520Letter%2520Template.pdf