APA (7th ed.) Citation

Chem, C., & Sharp, D. W. A. (1990). The Penguin dictionary of chemistry (2η έκδ.). Penguin Books.

Chicago Style (17th ed.) Citation

Chem, C., and D. W. A. Sharp. The Penguin Dictionary of Chemistry. 2η έκδ. London: Penguin Books, 1990.

MLA (8th ed.) Citation

Chem, C., and D. W. A. Sharp. The Penguin Dictionary of Chemistry. 2η έκδ. Penguin Books, 1990.