Blough, G. O., & Schwartz, J. (1990). Elementary school science and how to teach it (8th ed.). Harcourt brace.
芝加哥风格引文Blough, Glenn O., 与 Julius Schwartz. Elementary School Science and How to Teach It. 8th ed. Philadelphia: Harcourt brace, 1990.
MLA引文Blough, Glenn O., 与 Julius Schwartz. Elementary School Science and How to Teach It. 8th ed. Harcourt brace, 1990.
警告：这些引文格式不一定是100％准确.