Hill, J. W., & Kolb, D. K. (2001). Chemistry for changing times (9th ed.). Prentice Hall.
Cita Chicago (17th ed.)Hill, John William, i Doris K. Kolb. Chemistry for Changing Times. 9th ed. Upper Saddle River, NJ: Prentice Hall, 2001.
Cita MLA (9th ed.)Hill, John William, i Doris K. Kolb. Chemistry for Changing Times. 9th ed. Prentice Hall, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.