Welcome Nathalie! Glad to see another Canadian at SBB!
As for posting credits, posting the designer's name and name of the kit works really well.
(So you are doing it perfectly).

Give us a shout if you need any help or assistance, and hope you have fun here!

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Colleen in Friendly Manitoba...
Proudly selling digital designs at SBB
(Come take a peek at my Gallery or check my BLOG to see what I'm up to)