Cita APA (7th ed.)

Portmann. (2013). The FORA Framework (1.). Springer Berlin Heidelberg.

Cita Chicago (17th ed.)

Portmann. The FORA Framework. 1. Springer Berlin Heidelberg, 2013.

Cita MLA (8th ed.)

Portmann. The FORA Framework. 1. Springer Berlin Heidelberg, 2013.