APA Style

Ehlers, E, G. (1987). Optical Mineralogy: Mineral Descriptions (Volume 2) (Volume 2). Oxford (also mentions Palo Alt: Blackwell Scientific Publications.

MLA Style

Ehlers, Ernest, G.. "Optical Mineralogy: Mineral Descriptions (Volume 2)". Volume 2 Oxford (also mentions Palo Alt: Blackwell Scientific Publications, 1987. BOOK.