एपीए उद्धरण

Read, P. G. (1978). Gemmological instruments. Newnes - Butterworths.

शिकागो स्टाइल उद्धरण

Read, Peter G. Gemmological Instruments. London: Newnes - Butterworths, 1978.

एमएलए उद्धरण

Read, Peter G. Gemmological Instruments. Newnes - Butterworths, 1978.