Alvarez, L. B. (2015). Ang pinagmulan ng St. Valentine's Day at ang kahulugan ng pag-ibig. Liwayway.
Παραπομπή σε μορφή Chicago (17η εκδ.)Alvarez, Lilia Borlongan. "Ang Pinagmulan Ng St. Valentine's Day at Ang Kahulugan Ng Pag-ibig." Liwayway 2015.
Παραπομπή σε μορφή MLA (9th εκδ.)Alvarez, Lilia Borlongan. "Ang Pinagmulan Ng St. Valentine's Day at Ang Kahulugan Ng Pag-ibig." Liwayway, 2015.
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