APA (7th ed.) Citation

Hardy, W. (1986). A guide to art nouveau style. Chartwell Books.

Chicago Style (17th ed.) Citation

Hardy, William. A Guide to Art Nouveau Style. Secaucus, N.J.: Chartwell Books, 1986.

MLA (9th ed.) Citation

Hardy, William. A Guide to Art Nouveau Style. Chartwell Books, 1986.