How to add two series for one book?

[Nan]

I was wondering if a book is part of two separate series, how do I write it on the title field.
For example:
Christmas at Copper Mountain
Is part of two series: Copper Mountain Christmas, #4 and Taming of the Sheenans, #1
Do I write the series as:
1. (Copper Mountain Christmas, #4; Taming of the Sheenans, #1)
2. (Copper Mountain Christmas, #4) (Taming of the Sheenans, #1)
I've come across both ways whilst editing books and I don't know which one is the right way...

[Z-squared]

there was a thread awhile back discussing this issue:

https://www.goodreads.com/topic/show/...

From there, I don't think there's a standard agreed upon. Option 1 is OK, option 2 is not, but the best option (or at least what RIvka suggested) was no series in the title field at all.

[Nan]

Ahh right didn't see that thread.
So it would be better have no series in the title field, and just have it in the series field?
I'm a bit iffy about that, maybe I'll just do option 1.