Gaya APA
Ferguson, J. (1978).
Pelagius, a historical and theological study. Cet.pertama 1956. .
Cambridge:
WHeffer & Sons.
Gaya MLA
Ferguson, John..
"Pelagius, a historical and theological study. Cet.pertama 1956. ".
Cambridge:
WHeffer & Sons,
1978.
Buku.