Cita APA (7th ed.)

Ehlers, E. G. (1987). Optical mineralogy. Blackwell Scientific Publications.

Cita Chicago (17th ed.)

Ehlers, Ernest G. Optical Mineralogy. Palo Alto, Calif.: Blackwell Scientific Publications, 1987.

Cita MLA (9th ed.)

Ehlers, Ernest G. Optical Mineralogy. Blackwell Scientific Publications, 1987.