Rittel, H. W. J. (1966). Some principles for the design of an educational system for design. Univ.of California.
芝加哥风格引文Rittel, Horst W. J. Some Principles for the Design of an Educational System for Design. Berkeley, Calif.: Univ.of California, 1966.
MLA引文Rittel, Horst W. J. Some Principles for the Design of an Educational System for Design. Univ.of California, 1966.
警告：这些引文格式不一定是100％准确.