APA-referens (7:e uppl.)

University of the Philippines Diliman. College of Engineering, Matias, A., Reyes, G., & Gonzalez, J. I. (2012). Downstream industry ng tanso o copper. DZUP.

Chicago-referens (17:e uppl.)

University of the Philippines Diliman. College of Engineering, Aura Matias, Gerard Reyes, och John Ivan Gonzalez. Downstream Industry Ng Tanso O Copper. Quezon City: DZUP, 2012.

MLA-referens (9:e uppl.)

University of the Philippines Diliman. College of Engineering, et al. Downstream Industry Ng Tanso O Copper. DZUP, 2012.