Παραπομπή σε μορφή APA (7η εκδ.)

Morgans, H., & Morgans, H. S. (1997). Early to middle Jurassic stratigraphic development, vegetation and climate change in north-western Europe.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Morgans, H., και Helen Sarah Morgans. Early to Middle Jurassic Stratigraphic Development, Vegetation and Climate Change in North-western Europe. 1997.

Παραπομπή σε μορφή MLA (9th εκδ.)

Morgans, H., και Helen Sarah Morgans. Early to Middle Jurassic Stratigraphic Development, Vegetation and Climate Change in North-western Europe. 1997.