Ringor, A. A., & Obille, K. L. B. (2012). Promosyon ng Filipino bilang wikang pambansa: Ang mga karanasan ng University of the Philippines Main Library. School of Library and Information Studies, University of the Philippines Diliman.
Cita Chicago (17th ed.)Ringor, Abigail A., i Kathleen Lourdes B. Obille. Promosyon Ng Filipino Bilang Wikang Pambansa: Ang Mga Karanasan Ng University of the Philippines Main Library. Quezon City: School of Library and Information Studies, University of the Philippines Diliman, 2012.
Cita MLA (9th ed.)Ringor, Abigail A., i Kathleen Lourdes B. Obille. Promosyon Ng Filipino Bilang Wikang Pambansa: Ang Mga Karanasan Ng University of the Philippines Main Library. School of Library and Information Studies, University of the Philippines Diliman, 2012.