Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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