APA (7th ed.) Citation

Sinkankas, J. (1961). Gemstones and minerals: How and where to find them. Van Nostrand.

Chicago Style (17th ed.) Citation

Sinkankas, John. Gemstones and Minerals: How and Where to Find Them. Princeton, N.J.: Van Nostrand, 1961.

MLA (9th ed.) Citation

Sinkankas, John. Gemstones and Minerals: How and Where to Find Them. Van Nostrand, 1961.