Dyfyniad APA

Blackburn, W. H., & Dennen, W. H. (1990). Principles of Minerology. Universal Book Stall.

Dyfyniad Arddull Chicago

Blackburn, William H., and William H. Dennen. Principles of Minerology. New Delhi: Universal Book Stall, 1990.

Dyfyniad MLA

Blackburn, William H., and William H. Dennen. Principles of Minerology. Universal Book Stall, 1990.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.