Help about the format of full block letter

Dear All,

Please check the format of this sample full block letter. Let me know whether it is ok or not, if not then please correct it.

Regards,
Usman Riaz.

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April 27, 2015
Re: Job# 2031
Hina Khan
Abbott Pharmaceuticals
House No. 44, Shehroz Street, Lahore, Pakistan-54000
Phone #: 0333-------
Email: Email Removed">Email Removed

Mr. Ali Abbas
Shisham Furnishers
72-Abbot Road, Mall Road
Lahore.

Note: P.T.O

Dear Sir

Letter of reference

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Sincerely

Hina Khan
Manager, Abbott Pharmaceuticals
Cc: Mr. Mehmood Shah

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