Hill, J. W., & Kolb, D. K. (1995). Chemistry for changing times: Student study guide (7th ed.). Prentice-Hall.
Cita Chicago (17th ed.)Hill, John W., i Doris K. Kolb. Chemistry for Changing Times: Student Study Guide. 7th ed. Upper Saddle River, NJ: Prentice-Hall, 1995.
Cita MLA (9th ed.)Hill, John W., i Doris K. Kolb. Chemistry for Changing Times: Student Study Guide. 7th ed. Prentice-Hall, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.