Cita APA (7a ed.)

Farn, A. E. (1986). Pearls, natural, cultured, and imitation. Butterworths.

Cita Chicago Style (17a ed.)

Farn, Alexander E. Pearls, Natural, Cultured, and Imitation. London ; Boston: Butterworths, 1986.

Cita MLA (8a ed.)

Farn, Alexander E. Pearls, Natural, Cultured, and Imitation. Butterworths, 1986.