Mandaric said: "The atmosphere on Saturday was brilliant and we would like to thank everyone who came to the stadium for creating it with their passionate support. It must have been one of the best days for everyone connected to City in the last couple of years.
"A convincing win in a local derby is always special and with Forest doing so well this season, it was another great performance from the team.
"We're now giving everyone the chance to join the promotion push and see City fight to secure a top-six finish. All of us know what a difference it makes to play in front of a full house at home and what a great feeling it is to be a part of this crowd, seeing the team succeed.
"A vocal home support has made a huge difference in the last home games as we put five past Scunthorpe and three past Forest."