APA-Zitierstil (7. Ausg.)

Webster, R. (1983). Gems: Their sources, descriptions and identification (4. ed.). Butterworths.

Chicago-Zitierstil (17. Ausg.)

Webster, Robert. Gems: Their Sources, Descriptions and Identification. 4. ed. London u.a: Butterworths, 1983.

MLA-Zitierstil (9. Ausg.)

Webster, Robert. Gems: Their Sources, Descriptions and Identification. 4. ed. Butterworths, 1983.