The New Schaff-Herzog Encyclopedia of Religious Knowledge (Herzog, Johann Jakob/Schaff, Philip/Hauck, Albert)
The Doctrine of Endless Punishment (Shedd, William Greenough Thayer)
History of Dogma; Volume 2 (Bruce, Alexander Balmain/Harnack, Adolf von/Buchanan, Neil)
LA CARA OCULTA DE LOS OVNIS (COLIN RIVAS/ANTHONY HILDER/JORDAN MAXWELL)
