Crisostomo, C. Q., Leung, V. C. P., Senar, R. T. S., Villar, M. Z. P., & Virola, H. R. B. (1992). A Feasibility study on the expansion of the Posblock Building System. College of Engineering.

Crisostomo, Catherine Q., Vincent Charles P. Leung, Racquel Theresa S. Senar, Maria Zenaida P. Villar, и Henry Rophen B. Virola. A Feasibility Study on the Expansion of the Posblock Building System. Diliman, Quezon City: College of Engineering, 1992.

Crisostomo, Catherine Q., et al. A Feasibility Study on the Expansion of the Posblock Building System. College of Engineering, 1992.