ebrary, Inc, Nesbit, T., & Welton, M. (2013). Adult education and learning in precarious age: The Hamburg declaration revisited. Jossey-Bass.
芝加哥风格引文ebrary, Inc, Tom Nesbit, 与 Michael Welton. Adult Education and Learning in Precarious Age: The Hamburg Declaration Revisited. San Francisco, Calif.: Jossey-Bass, 2013.
MLA引文ebrary, Inc, et al. Adult Education and Learning in Precarious Age: The Hamburg Declaration Revisited. Jossey-Bass, 2013.
警告：这些引文格式不一定是100％准确.