North, F. J. (1929). The evolution of the Bristol Channel: With special reference to the coast of South Wales. National Museum of Wales [u.a].
Chicago-Zitierstil (17. Ausg.)North, Frederick John. The Evolution of the Bristol Channel: With Special Reference to the Coast of South Wales. Cardiff: National Museum of Wales [u.a], 1929.
MLA-Zitierstil (9. Ausg.)North, Frederick John. The Evolution of the Bristol Channel: With Special Reference to the Coast of South Wales. National Museum of Wales [u.a], 1929.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.