Petrucci, R. H., & Harwood, W. S. (1997). General chemistry: Principles and modern applications (7th ed.). Prentice Hall.
Cita Chicago (17th ed.)Petrucci, Ralph H., i William S. Harwood. General Chemistry: Principles and Modern Applications. 7th ed. Upper Saddle River, N.J.: Prentice Hall, 1997.
Cita MLA (9th ed.)Petrucci, Ralph H., i William S. Harwood. General Chemistry: Principles and Modern Applications. 7th ed. Prentice Hall, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.