Ordnance Survey Map of Dublin
Citation format: OS [scale, year].
A good list of Ordnance Survey (OS) maps, and other historical maps, with links, can be found on the UCD library lib guides at https://libguides.ucd.ie/findingmaps/mapshistdublin.
You’ll also find there a very helpful guide to using the Ordnance Survey historical map viewer, which I, for one, find tricky to use.
The easiest online versions, in my experience, are those on the National Library of Scotland website at https://maps.nls.uk/os/6inch-ireland/county/dublin.