Cita APA (7a ed.)

Iserhardt Ritzel, M. (2002). A system for control of use of didactic material at the distance.

Cita Chicago Style (17a ed.)

Iserhardt Ritzel, Marcelo. A System for Control of Use of Didactic Material at the Distance. 2002.

Cita MLA (8a ed.)

Iserhardt Ritzel, Marcelo. A System for Control of Use of Didactic Material at the Distance. 2002.