Harina, R. (1991). Programmed computer learning. National BookStore.
芝加哥风格引文Harina, R.M. Programmed Computer Learning. Metro Manila: National BookStore, 1991.
MLA引文Harina, R.M. Programmed Computer Learning. National BookStore, 1991.
警告：这些引文格式不一定是100％准确.