APA (7th ed.) Citation

Benchmark Media (Firm),$4dst, & Kanopy (Firm),$4dst. (1999). Science Key Concepts: Chemistry. Benchmark Media.

Chicago Style (17th ed.) Citation

Benchmark Media (Firm),$4dst, and Kanopy (Firm),$4dst. Science Key Concepts: Chemistry. [San Francisco, California, USA]: Benchmark Media, 1999.

MLA (9th ed.) Citation

Benchmark Media (Firm),$4dst, and Kanopy (Firm),$4dst. Science Key Concepts: Chemistry. Benchmark Media, 1999.