Cita APA (7th ed.)

Heimler, C. H., & Price, J. S. (1984). Focus on physical science. Merrill.

Cita Chicago (17th ed.)

Heimler, Charles H., i Jack S. Price. Focus on Physical Science. Columbus, OH: Merrill, 1984.

Cita MLA (9th ed.)

Heimler, Charles H., i Jack S. Price. Focus on Physical Science. Merrill, 1984.