How to install specific Ubuntu packages with exact version

1)
$ sudo apt-cache policy python-neutron
python-neutron:
  Installed: 2015.1.3.dev74+1
  Candidate: 2015.1.3.dev74+1
  Version table:
     1:2015.1.2-0ubuntu2~cloud0 0
        700 http://11.11.11.9/snapshots/5b1646b3-6124-4e6b-a42b-e1af7428c5d9/ubuntu-cloud.archive.canonical.com/ubuntu/ trusty-updates/kilo/main amd64 Packages

2)
$ sudo apt-get install python-neutron=1:2015.1.2-0ubuntu2~cloud0