Cita APA (7th ed.)

Krieger, P. J. (1999). Understanding chemical principles: A learning companion. Prentice Hall.

Cita Chicago (17th ed.)

Krieger, Peter J. Understanding Chemical Principles: A Learning Companion. Upper Saddle River, N.J: Prentice Hall, 1999.

Cita MLA (9th ed.)

Krieger, Peter J. Understanding Chemical Principles: A Learning Companion. Prentice Hall, 1999.