Where do I find the warlock specialization summon spells?

Sorry to ask a dumb question (probably) but I'm trying out retail wow after a few years and I can't find for the life of me the specialization "Summon ... " spells for my warlock, e.g. "Summon darkglade" or "Summon infernal". They are not listed as spells in my spellbook and are also not avaialble as demons in the "Summon demon" spell. I mean, I can see them listed in the specialization screen, but I can't add them to my actionbars from there. Its happening for all my warlocks in all specializations.

I'm missing something essential, I'm quite sure. Can someone help me please?