Gaya APA

al., H, F, H, J, E. (1984). General chenisty. -- 7th ed. (7th ed.). Lexington: D. C. Heath and Co..

Gaya MLA

al., Henry, F., Holtzclaw, Jr.,, Et.. "General chenisty. -- 7th ed.". 7th ed. Lexington: D. C. Heath and Co., 1984. Text.