Alvarez, L. B. (2015). Ang pinagmulan ng St. Valentine's Day at ang kahulugan ng pag-ibig. Liwayway.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিAlvarez, Lilia Borlongan. "Ang Pinagmulan Ng St. Valentine's Day at Ang Kahulugan Ng Pag-ibig." Liwayway 2015.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিAlvarez, Lilia Borlongan. "Ang Pinagmulan Ng St. Valentine's Day at Ang Kahulugan Ng Pag-ibig." Liwayway, 2015.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.