Petrash, J. (2002). Understanding Waldorf education: Teaching from the inside out. Gryphon House.
芝加哥风格引文Petrash, Jack. Understanding Waldorf Education: Teaching from the Inside Out. Beltsville, Md: Gryphon House, 2002.
MLA引文Petrash, Jack. Understanding Waldorf Education: Teaching from the Inside Out. Gryphon House, 2002.
警告：这些引文格式不一定是100％准确.