Cayabyab, M. J. G., & Dela Torre, N. N. (2006). User satisfaction in the use of available alternative formats among visually impaired users of Library for the Blind Division of the National Library.

Cayabyab, Mark James G., and Nathalie N. Dela Torre. User Satisfaction in the Use of Available Alternative Formats Among Visually Impaired Users of Library for the Blind Division of the National Library. Quezon City : Institute of Library and Information Science, University of the Philippines Diliman, 2006.

Cayabyab, Mark James G., and Nathalie N. Dela Torre. User Satisfaction in the Use of Available Alternative Formats Among Visually Impaired Users of Library for the Blind Division of the National Library. 2006.