Not to be one to put a damper on things but we need to be a bit realistic here. Callin predators isn't just something you pick up and have success with. It's just not that easy.
The inexperienced coyote hunter is much better off shooting from ambush. Think bait piles. Road kill up to deer and even table scraps. Be religious about putting bait on site as often as you can. Hunt dusk and dawn, be on stand an hour before shooting light or couple hours before dark in the evening, play the wind.
But as has been known for a few centuries now, the best vermin protection system you can have is a good dog.