Gaya APA
Muëller, R, M, M, O. (1961).
Thomistic social science. Excerpta ex dissertationes, Roma, 1961. .
Illinois:
Aquinas library.
Gaya MLA
Muëller, Robert, Matthias,, MO,, O.P..
"Thomistic social science. Excerpta ex dissertationes, Roma, 1961. ".
Illinois:
Aquinas library,
1961.
Buku.