Ehrat, K. S. (1997). The art of EKG interpretation: A self-instructional text (4th ed.). Kendall/Hunt.
芝加哥风格引文Ehrat, Karen S. The Art of EKG Interpretation: A Self-instructional Text. 4th ed. Dubuque,Iowa: Kendall/Hunt, 1997.
MLA引文Ehrat, Karen S. The Art of EKG Interpretation: A Self-instructional Text. 4th ed. Kendall/Hunt, 1997.
警告:这些引文格式不一定是100%准确.