The best way I have found to answer these questions is to go to the IETF site, and specifically to the working group addressing the subject matter, and see what they are working on (Internet Drafts) and what they have published in the past (RFCs).

For MANET, take a look at:

https://datatracker.ietf.org/wg/manet/documents/

You'll note that what seems to be attracting the most attention are OLSR and AODV. Much less so DSR. I think your best bet is to read the Internet Drafts, the first few sections anyway, to see "where the wind is blowing," so to speak. Anything new that people are taking seriously should appear in the Internet Drafts. What's "official" would be published in an RFC.

And you can also subscribe to the MANET working group, so you can read in real time what people are discussing. This is the best way to know all the ins and outs.

This paper is interesting. It compares the distance vector MANET routing protocols, AODV, DSR, and DSDV, in case you want to see the tradeoffs.

http://www.ijcaonline.org/volume15/number2/pxc3872562.pdf

Currently, there is only one "standard" MANET routing protocol in IETF, that's OLSRv2 (https://tools.ietf.org/html/rfc7181). Pay attention, while it shares the same idea with OLSR (RFC3626), it's not interoperable with OLSR. 

Other MANET protocol such as AODV, DSR, they have their RFCs, but those are "experimental" track protocols, not really "standard". 

 Thanks Albert. That's really helpful as I find that link loaded with information.

On a side, we also had a basic performance analysis of those protocols. This paper, although basic, might be helpful in addition to the paper Albert suggested.

http://www.ee.ucl.ac.uk/lcs/previous/LCS2010/lens2010_submission_18.pdf

please reffer to ietf site for other RFC's and standards

aodv, dsr, dsdv

Sourav: technically, neither of those protocols are "Standard MANET routing protocols". As Jiazi calls out, only OLSRv2 is standardized.