Gaya APA

CHANG, R., GOLDSBY, K, A. (2016). CHEMISTRY TWELFTH EDITION (ED. 12). NEW YORK: Mc Graw Hill.

Gaya MLA

CHANG, RAYMOND., GOLDSBY, KENNETH, A.. "CHEMISTRY TWELFTH EDITION". ED. 12 NEW YORK: Mc Graw Hill, 2016. Text.