GNU/Linux Mint 18 Installing Broadcom BCM4311/BCM4312/BCM4313 Driver Guide
Hi! The linked Tutorial shows you Step-by-Step How to Install Broadcom BCM4311/BCM4312/BCM4313 Wi-fi/Bluetooth Driver in 18.x Sarah/Serena/Sonya/Sylvia LTS GNU/Linux.
The Package Provides the Source Code for the wl Kernel Modules and makes use of the DKMS Build Utility to Install them for the Running Kernel.
GNU/Linux Mint Broadcom BCM4311/BCM4312/BCM4313 Driver Installation Guide
Broadcom BCM4311/BCM4312/BCM4313 Driver Linux Mint 18 Installation Guide