Cita APA (7th ed.)

Porterfield, W. W. (1972). Concepts of chemistry. W. W. Norton.

Cita Chicago (17th ed.)

Porterfield, William W. Concepts of Chemistry. Nueva York: W. W. Norton, 1972.

Cita MLA (9th ed.)

Porterfield, William W. Concepts of Chemistry. W. W. Norton, 1972.