Παραπομπή σε μορφή APA (7η εκδ.)

Black, R. (1992). Crisis and change in rural Europe: Agricultural development in the Portuguese mountains. Avebury.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Black, Richard. Crisis and Change in Rural Europe: Agricultural Development in the Portuguese Mountains. Aldershot: Avebury, 1992.

Παραπομπή σε μορφή MLA (8th εκδ.)

Black, Richard. Crisis and Change in Rural Europe: Agricultural Development in the Portuguese Mountains. Avebury, 1992.