Hi Howard,
it is not a conflicting Information: you can install June 2012 CU without installing SP1 first but you SHOULD install SP1 before installing June CU.
So - although you can install June CU without SP1 it is not recommended.
Installing June CU will Keep you Server on RTM baseline with the patches from June CU included. SP1 is not part of June CU - so you still have to install SP1 later.
Cheers,
Stefan