Cita APA

Fretter, V., & Graham, A. (1962). British prosobranch molluscs. Ray society.

Chicago Edition Citation

Fretter, Vera, i Alastair Graham. British Prosobranch Molluscs. London: Ray society, 1962.

Cita MLA

Fretter, Vera, i Alastair Graham. British Prosobranch Molluscs. Ray society, 1962.