APA-referens (7:e uppl.)

Ubalde, D. (1965). Securing coherence through sequence-signals. s.n.].

Chicago-referens (17:e uppl.)

Ubalde, Dolores. Securing Coherence Through Sequence-signals. [Quezon City: s.n.], 1965.

MLA-referens (9:e uppl.)

Ubalde, Dolores. Securing Coherence Through Sequence-signals. s.n.], 1965.