aCalendar has it, if i understand what you're asking. On the upper left hand corner, where where it has the date, and the little triangle, which obviously indicates that is a rectangle that opens, it opens up options to, in addition to time views, options for different all your different calendars. And it's radio box, so can choose any combination of the calendars.
This calendar is very gestury by the way, to get from month to week to day, it's a swipe horizontally, and to go from period of time to period of time, it's vertical swipes. The free version is really good and no adds, just no agenda view, only in paid version.
From what i'm seeing, on Business calendar you can choose your calendars with one hit on the bottom, they are listed out. Better looking week view too, but useless month view. But true to android style, gestures on Business Calendar are yes to one thing, and no to the other, which really annoys me, i'd rather have no gestures than left means one thing and right does either nothing or does something totally random and definitely won't get you back the way you came, like, come ON. lol. SO annoying.
If aCalendar more had the more common digital week view (as oppose to the style paper ones use), i'd be in heaven.