Ubalde, D. (1965). Securing coherence through sequence-signals. s.n.].
芝加哥风格引文Ubalde, Dolores. Securing Coherence Through Sequence-signals. [Quezon City: s.n.], 1965.
MLA引文Ubalde, Dolores. Securing Coherence Through Sequence-signals. s.n.], 1965.
警告：这些引文格式不一定是100％准确.