APA (7th ed.) Citation

Harper, L. D. (1980). A psychophysical examination of linear movement. [publisher not identified].

Chicago Style (17th ed.) Citation

Harper, Landis Doyle. A Psychophysical Examination of Linear Movement. [Place of publication not identified]: [publisher not identified], 1980.

MLA (9th ed.) Citation

Harper, Landis Doyle. A Psychophysical Examination of Linear Movement. [publisher not identified], 1980.