APA (7th ed.) Citation

Firsoff, V. A. (1971). Gemstones of the British Isles / by V.A. Firsoff. Oliver and Boyd.

Chicago Style (17th ed.) Citation

Firsoff, Valdemar Axel. Gemstones of the British Isles / by V.A. Firsoff. Edinburgh: Oliver and Boyd, 1971.

MLA (9th ed.) Citation

Firsoff, Valdemar Axel. Gemstones of the British Isles / by V.A. Firsoff. Oliver and Boyd, 1971.

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