Cita APA (7a ed.)

Estrada, S. (2015). Basic identity, 2. Index Book.

Cita Chicago Style (17a ed.)

Estrada, Silvia. Basic Identity, 2. [Barcelona]: Index Book, 2015.

Cita MLA (9a ed.)

Estrada, Silvia. Basic Identity, 2. Index Book, 2015.