Gaya APA

Brown, T, L. et al (1997). Chemistry : the central science (7th Ed. int Ed). Englewood Cliffs, NJ: Prentice Hall.

Gaya MLA

Brown, Theodore, L.. et al. "Chemistry : the central science". 7th Ed. int Ed Englewood Cliffs, NJ: Prentice Hall, 1997. Text.