APA (7th ed.) Citation

O'Leary, B. (1977). A field guide to Australian opals. Rigby.

Chicago Style (17th ed.) Citation

O'Leary, Barrie. A Field Guide to Australian Opals. Adelaide: Rigby, 1977.

MLA (8th ed.) Citation

O'Leary, Barrie. A Field Guide to Australian Opals. Rigby, 1977.

Warning: These citations may not always be 100% accurate.