APA-Zitierstil (7. Ausg.)

Webster, R. (1975). Gems: Their sources, descriptions and identification (3. ed.). Newnes-Butterworth.

Chicago-Zitierstil (17. Ausg.)

Webster, Robert. Gems: Their Sources, Descriptions and Identification. 3. ed. London: Newnes-Butterworth, 1975.

MLA-Zitierstil (9. Ausg.)

Webster, Robert. Gems: Their Sources, Descriptions and Identification. 3. ed. Newnes-Butterworth, 1975.