APA (7th ed.) Citation

Stone, D. I., & Stone, D. M. (1969). How to find Australian gemstones. Periwinkle Books.

Chicago Style (17th ed.) Citation

Stone, Derrick I., and Douglas M. Stone. How to Find Australian Gemstones. [Melbourne]: Periwinkle Books, 1969.

MLA (8th ed.) Citation

Stone, Derrick I., and Douglas M. Stone. How to Find Australian Gemstones. Periwinkle Books, 1969.

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