Gaya APA
Sawyer, C., N., McCarty, P., L. (1978).
Chemistry for environmental engineering (3 nd ed).
New York:
McGraw - Hill Book Company.
Gaya MLA
Sawyer, C., N., McCarty, P., L..
Chemistry for environmental engineering.
3 nd ed
New York:
McGraw - Hill Book Company,
1978.
Text.