Gaya APA
Sawyer, C, N. (2003).
CHEMISTRY FOR ENVIRONMENTAL ENGINEERING AND SCIENCE (Fifth edition).
Singapura:
Mc Graw Hill Education.
Gaya MLA
Sawyer, Clair, N.dk.
"CHEMISTRY FOR ENVIRONMENTAL ENGINEERING AND SCIENCE".
Fifth edition
Singapura:
Mc Graw Hill Education,
2003.
Books.