Borlaza, C., Mejia, J., & Sarabia, A. (1991). A Systems study of R.A. hats. College of Engineering.
芝加哥风格引文Borlaza, Carlo, Jonstein Mejia, 与 Allan Sarabia. A Systems Study of R.A. Hats. Diliman, Quezon City: College of Engineering, 1991.
MLA引文Borlaza, Carlo, et al. A Systems Study of R.A. Hats. College of Engineering, 1991.
警告：这些引文格式不一定是100％准确.