I'm developing a mobile app that uses Wiktionary API for retrieving some articles from Wiktionary. This application is going to be commercial. I've read that Wiktionary materials are available under Creative Commons Attribution-ShareAlike 3.0 Unported License. Also I've read next statement in the Wiktionary Terms of Use:
Please note that these licenses do allow commercial uses of your contributions, as long as such uses are compliant with the terms.
So my question is: how exactly do I implement "CC BY-SA 3.0" license in my application? I mean: what (links, names or something else) and where (popups or menu items) should I put into my application to satisfy this license?