On the threshold of the unseen : an examination of the phenomena of spiritualism and of the evidence for survival after death
MLA
Barrett, William. On the Threshold of the Unseen: an Examination of the Phenomena of Spiritualism and of the Evidence for Survival After Death. 3d ed. (rev.) (second impression). London: K. Paul, Trench, Trubner , 1920
APA, 7th edition
Barrett, W. (1920). On the threshold of the unseen: an examination of the phenomena of spiritualism and of the evidence for survival after death. 3d ed. (rev.) (second impression). London: K. Paul, Trench, Trubner
Chicago, 17th edition
Barrett, William. On the threshold of the unseen: an examination of the phenomena of spiritualism and of the evidence for survival after death. 3d ed. (rev.) (second impression). London: K. Paul, Trench, Trubner , 1920