Gaya APA
Romero, O, (. (1990).
Voice of the voiceless: the four pastoral letters and other statements. .
Maryknoll:
Orbis Books.
Gaya MLA
Romero, Oscar, (1917-1980).
"Voice of the voiceless: the four pastoral letters and other statements. ".
Maryknoll:
Orbis Books,
1990.
Buku.