Leonard, E. M. (1997). Creative tension: The spiritual legacy of Friedrich von Hügel. Univ. of Scranton Press.
芝加哥风格引文Leonard, Ellen M. Creative Tension: The Spiritual Legacy of Friedrich Von Hügel. Scranton: Univ. of Scranton Press, 1997.
MLA引文Leonard, Ellen M. Creative Tension: The Spiritual Legacy of Friedrich Von Hügel. Univ. of Scranton Press, 1997.
警告：这些引文格式不一定是100％准确.