APA (7th ed.) Citation

Gray, J. E. Supplement to the catalogue of seals and whales in the British Museum.

Chicago Style (17th ed.) Citation

Gray, John Edward. Supplement to the Catalogue of Seals and Whales in the British Museum.

MLA (9th ed.) Citation

Gray, John Edward. Supplement to the Catalogue of Seals and Whales in the British Museum.

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