Gaya APA
Backer, S, S. (1908).
Institutiones metaphysicae specialis, tomus quartus. Theologia naturalis. Imprimatur 1899 .
Paris:
Beauchesne.
Gaya MLA
Backer, St.de,, S.J..
"Institutiones metaphysicae specialis, tomus quartus. Theologia naturalis. Imprimatur 1899 ".
Paris:
Beauchesne,
1908.
Buku.