Dyfyniad APA

Fitts, P., & Posner, M. (1969). Human performance. Prentice Hall of India.

Dyfyniad Arddull Chicago

Fitts, P.M, and M.I Posner. Human Performance. New Delhi: Prentice Hall of India, 1969.

Dyfyniad MLA

Fitts, P.M, and M.I Posner. Human Performance. Prentice Hall of India, 1969.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.