APA-referens (7:e uppl.)
Hittinger, R. (2007). The first grace: Rediscovering the natural law in a post-Christian world (Paperback edition.). ISI Books.
Chicago-referens (17:e uppl.)
Hittinger, Russell. The First Grace: Rediscovering the Natural Law in a Post-Christian World. Paperback edition. Wilmington, DE: ISI Books, 2007.
MLA-referens (9:e uppl.)
Hittinger, Russell. The First Grace: Rediscovering the Natural Law in a Post-Christian World. Paperback edition. ISI Books, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.