Cita APA (7th ed.)
SOMMER, K., & ET AL. (1990). TEACHING SEVERELY RETARDED PERSONS TO SIGN INTERACTIVELY THROUGH THE USEOF A BEHAVIORAL SCRIPT.
Cita Chicago (17th ed.)
SOMMER, K.S, i ET AL. TEACHING SEVERELY RETARDED PERSONS TO SIGN INTERACTIVELY THROUGH THE USEOF A BEHAVIORAL SCRIPT. 1990.
Cita MLA (9th ed.)
SOMMER, K.S, i ET AL. TEACHING SEVERELY RETARDED PERSONS TO SIGN INTERACTIVELY THROUGH THE USEOF A BEHAVIORAL SCRIPT. 1990.
Atenció: Aquestes cites poden no estar 100% correctes.