ebrary, Inc, Langley, E. J., & Knowles, R. B. (2012). Psychology of sadness. Nova Science Publishers.
Chicago Style (17th ed.) Citationebrary, Inc, Emile J. Langley, and Roger B. Knowles. Psychology of Sadness. New York: Nova Science Publishers, 2012.
MLA引文ebrary, Inc, et al. Psychology of Sadness. Nova Science Publishers, 2012.
警告:這些引文格式不一定是100%准確.