Dyfyniad APA

Varley, E. R. (1968). Sillimanite: Andalusite, kyanite, sillimanite ([1st American ed.].). Chemical Pub. Co.

Dyfyniad Arddull Chicago

Varley, Ernest Reginald. Sillimanite: Andalusite, Kyanite, Sillimanite. [1st American ed.]. New York: Chemical Pub. Co, 1968.

Dyfyniad MLA

Varley, Ernest Reginald. Sillimanite: Andalusite, Kyanite, Sillimanite. [1st American ed.]. Chemical Pub. Co, 1968.

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