Gaya APA
Kristanto, B. (2021).
Sola Gratia Dei : Buku Pegangan Soteriologi (First Edition).
Surabaya, Indonesia:
Penerbit Momentum.
Gaya MLA
Kristanto, Billy.
"Sola Gratia Dei : Buku Pegangan Soteriologi".
First Edition
Surabaya, Indonesia:
Penerbit Momentum,
2021.
Academic.