APA-Zitierstil (7. Ausg.)

(1951). Sources of guidance for the early Filipinos. s.n.

Chicago-Zitierstil (17. Ausg.)

Sources of Guidance for the Early Filipinos. [Quezon City: s.n, 1951.

MLA-Zitierstil (9. Ausg.)

Sources of Guidance for the Early Filipinos. s.n, 1951.