Mailing address format in India : Is this correct?

I’d like to have an exact format of business mailing address in India (comma, abbreviations….) I wanna know if this is correct or not :

PNB Building, 4th Floor
5 Wallace Street, Fort
400 001 Mumbai
India

…or do I have to use Bldg. for building and 4/F instear of 4th Floor?

pls i need help concerning buying a book from india to nigeria?

pls i need help concerning buying a book by R S AGGARWAL on quantitative aptitude from india to west africa. i would love some1 nice to help purchase it and mailed it to the nearest post office.
i really need this help..its price plus the mailing prices to know if i can afford it. should be the first help.. thank you