Swango, C. J., & Steward, S. B. (2002). Help! I'm teaching middle school science. NSTApress.
芝加哥风格引文Swango, C. Jill, 与 Sally Boles Steward. Help! I'm Teaching Middle School Science. Arlington, Va.: NSTApress, 2002.
MLA引文Swango, C. Jill, 与 Sally Boles Steward. Help! I'm Teaching Middle School Science. NSTApress, 2002.
警告：这些引文格式不一定是100％准确.