APA (7th ed.) Citation

Wright, C. W., & Kennedy, W. J. (1980). Origin, evolution and systematics of the dwarf acanthoceratid Protacanthoceras Spath, 1923 (Cretaceous Ammonoidea). British Museum (Natural History).

Chicago Style (17th ed.) Citation

Wright, C. W., and W. J. Kennedy. Origin, Evolution and Systematics of the Dwarf Acanthoceratid Protacanthoceras Spath, 1923 (Cretaceous Ammonoidea). London: British Museum (Natural History), 1980.

MLA (9th ed.) Citation

Wright, C. W., and W. J. Kennedy. Origin, Evolution and Systematics of the Dwarf Acanthoceratid Protacanthoceras Spath, 1923 (Cretaceous Ammonoidea). British Museum (Natural History), 1980.