[Koha] installing a particular version of Koha on UbtuL. ntu 16.04

I would like to install Koha 16.11 on Ubuntu 16.04 LTS using apt-get install method. Howdo I go about it given the current version is 17.05. -- Kind Regards, Admire Mutsikiwa (Mr) ICT Manager Libraries University of Zimbabwe Tel:+263-4-303276 Mob:+263782476883 “It is easy to dodge our responsibilities, but we cannot dodge the consequences of dodging our responsibilities.” Josiah Charles Stamp