Cita APA (7a ed.)

KRAUS,SLAWSON. (1969). GEMS & GEM MATERIALS. MCGRAW - HILL BOOK CO.

Cita Chicago Style (17a ed.)

KRAUS,SLAWSON. GEMS & GEM MATERIALS. NEW YORK: MCGRAW - HILL BOOK CO, 1969.

Cita MLA (9a ed.)

KRAUS,SLAWSON. GEMS & GEM MATERIALS. MCGRAW - HILL BOOK CO, 1969.