APA (7th ed.) Citation

Grigson, G. (1964). The Shell nature book. Phoenix House.

Chicago Style (17th ed.) Citation

Grigson, Geoffrey. The Shell Nature Book. London: Phoenix House, 1964.

MLA (9th ed.) Citation

Grigson, Geoffrey. The Shell Nature Book. Phoenix House, 1964.

Warning: These citations may not always be 100% accurate.