Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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