APA-referens (7:e uppl.)

Clifford, W. K. (1879). Seeing and thinking. Macmillan and Co..

Chicago-referens (17:e uppl.)

Clifford, William Kingdon. Seeing and Thinking. London: Macmillan and Co., 1879.

MLA-referens (8:e uppl.)

Clifford, William Kingdon. Seeing and Thinking. Macmillan and Co., 1879.