Fretter, V., & Graham, A. (1962). British prosobranch molluscs. Ray society.
Chicago Edition CitationFretter, Vera, i Alastair Graham. British Prosobranch Molluscs. London: Ray society, 1962.
Cita MLAFretter, Vera, i Alastair Graham. British Prosobranch Molluscs. Ray society, 1962.
Atenció: Aquestes cites poden no estar 100% correctes.