Gaya APA
1926, H., J., G., 1932, H., G., W. (1989).
Environmental science and engineering / Glynn Henry, Gery W. Heinke .
Englewood Cliffs N.J.:
Prentice Hall.
Gaya MLA
1926, Henry, J., Glynn,., Heinke, Gary,, W.,, 1932.
"Environmental science and engineering / Glynn Henry, Gery W. Heinke".
Englewood Cliffs N.J.:
Prentice Hall,
1989.
Textbook.