APA (7th ed.) Citation

Calladine, C. R., & Drew, H. R. (1997). Understanding DNA: The molecule and how it works (3rd ed.). Academic Press.

Chicago Style (17th ed.) Citation

Calladine, C. R., and Horace R. Drew. Understanding DNA: The Molecule and How It Works. 3rd ed. San Diego, Calif: Academic Press, 1997.

MLA (9th ed.) Citation

Calladine, C. R., and Horace R. Drew. Understanding DNA: The Molecule and How It Works. 3rd ed. Academic Press, 1997.