APA (7th ed.) Citation

O'Neil,Paul. (1991). Gemstones. Time Life Book.

Chicago Style (17th ed.) Citation

O'Neil,Paul. Gemstones. Amsterdams: Time Life Book, 1991.

MLA (9th ed.) Citation

O'Neil,Paul. Gemstones. Time Life Book, 1991.

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