Gaya APA
Ladd, G, E. (1987).
A commentary on the revelation of John, rev.ed Cet.pertama 1972 .
Grand Rapids:
Eerdmans.
Gaya MLA
Ladd, George, Eldon..
"A commentary on the revelation of John, rev.ed Cet.pertama 1972 ".
Grand Rapids:
Eerdmans,
1987.
Buku.