Cita APA (7th ed.)

(1979). Physical science (2nd ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Physical Science. 2nd ed. New York: McGraw-Hill, 1979.

Cita MLA (9th ed.)

Physical Science. 2nd ed. McGraw-Hill, 1979.

Atenció: Aquestes cites poden no estar 100% correctes.