APA-viite (7. p.)

Ryan, M. P. (1975). Programmed learning aid for person perception. Learning Systems.

Chicago-viite (17. p.)

Ryan, Michael P. Programmed Learning Aid for Person Perception. Homewood, Ill: Learning Systems, 1975.

MLA-viite (9. p.)

Ryan, Michael P. Programmed Learning Aid for Person Perception. Learning Systems, 1975.