APA (7th ed.) Citation

Wallis, K. (2006). Gemstones: Understanding, identifying, buying. Antique Collectors' Club.

Chicago Style (17th ed.) Citation

Wallis, Keith. Gemstones: Understanding, Identifying, Buying. Woodbridge: Antique Collectors' Club, 2006.

MLA (9th ed.) Citation

Wallis, Keith. Gemstones: Understanding, Identifying, Buying. Antique Collectors' Club, 2006.

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