This is one of many quality tutorials here on Balg ( the best one if you ask me 
).
This is a method I developed that is a hybrid of traditional Solomonic technique and demonaltry practice.
Many Magicians have given me positive feedback with this.
In fact this is the method I used when I successfully evoked all 72 of the spirits of the Goetia. ( Check out my previous journal if you like).
No need to buy many books on it and confuse yourself with differing philosophy or practices.
Try this and you’ll be well on your way to working with infernal spirits and mastering the art of evocation.
This method is Angel and RHP god names free and it works like the devil.
Good fortune my friend.