APA (7th ed.) Citation

Hudson, W. H. (1929). A crystal age. Duckworth & co..

Chicago Style (17th ed.) Citation

Hudson, W. H. A Crystal Age. London: Duckworth & co., 1929.

MLA (9th ed.) Citation

Hudson, W. H. A Crystal Age. Duckworth & co., 1929.

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