Hallgren, R. C. (1982). Interface projects for the Apple II. Prentice-Hall.
芝加哥风格引文Hallgren, Richard C. Interface Projects for the Apple II. Englewood Cliffs, N.J.: Prentice-Hall, 1982.
MLA引文Hallgren, Richard C. Interface Projects for the Apple II. Prentice-Hall, 1982.
警告：这些引文格式不一定是100％准确.