Cita APA (7th ed.)
Bernstein Leonard. (2004). Chemical changes: Concepts and challenges. Pearson Education..
Cita Chicago (17th ed.)
Bernstein Leonard. Chemical Changes: Concepts and Challenges. America: Pearson Education., 2004.
Cita MLA (9th ed.)
Bernstein Leonard. Chemical Changes: Concepts and Challenges. Pearson Education., 2004.
Atenció: Aquestes cites poden no estar 100% correctes.