Cita APA (7a ed.)

Covella, G. J., & Olsina Santos, L. A. (2002). Specifying quality characteristics and attributes for E-Learning sites.

Cita Chicago Style (17a ed.)

Covella, Guillermo Juan, y Luis Antonio Olsina Santos. Specifying Quality Characteristics and Attributes for E-Learning Sites. 2002.

Cita MLA (8a ed.)

Covella, Guillermo Juan, y Luis Antonio Olsina Santos. Specifying Quality Characteristics and Attributes for E-Learning Sites. 2002.