Παραπομπή σε μορφή APA (7η εκδ.)

Heilmann, P. G. F. (1972). On the formation of red soils in the lower Crati Basin, S. Italy. International Institute for Aerial Survey and Earth Sciences.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Heilmann, P. G. F. On the Formation of Red Soils in the Lower Crati Basin, S. Italy. Enschede, Netherlands: International Institute for Aerial Survey and Earth Sciences, 1972.

Παραπομπή σε μορφή MLA (8th εκδ.)

Heilmann, P. G. F. On the Formation of Red Soils in the Lower Crati Basin, S. Italy. International Institute for Aerial Survey and Earth Sciences, 1972.