Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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