Thanks @Mehmet for the follow-up. I've already done the tutorial. In the tutorial, the select/combobox is bound to an array, I understand the logic behind. The part I don't understand is how to structure the code using a reference entity instead of an enum/array. Should the BookListComponent be responsible for handling all reference entities or do I need to create a new NGSX store for all reference entities. Like I said, sorry the basic question, I guess I need to learn more about Angular and NGSX fundamentals.
Thanks @yekalkan.
Cheers,