Let’s clear the requisites/intended setup first.
The network/internet is connected by wire to the Mikrotik and you want some devices (printer as an example) to connect wirelessly to it.
If this is the case, you want the Mikrotik to be an Access Point, not a client (station).
Even if it is technically incorrect, because a bridge is a bridge, the previous posts are about main network/internet “coming from” WiFi and being distributed to wired interfaces, while your use case is the reverse with main network/internet “coming from” wired interfaces and being distributed to WiFI.
See:
http://forum.mikrotik.com/t/apbridge-mode-vs-station-mode/131651/1
So you want the radio to be in “ap-bridge” or “ap” mode (in v7) and it will “create” a WiFi network to which the printer and other devices will connect to.
The documentation is often confusing, also because things changed from v6 (wireless menu/section) and v7 (wifi menu/section).