Enger, Eldon D.
Environmental science: a study of interrelationships
McGraw-Hill Higher Education, 2004
 Buku Teks
Enger, Eldon D.
Environmental science : a study of interrelationships
McGraw-Hill, 2013
 Buku Teks
Enger, Eldon D.
Environmental science : a study of interrelationships
McGraw-Hill Higher Education, 2004
 Buku Referensi
Schiller, Bradley R.
The Economy / Bradley R. Schiller
Prentica-Hall , 1975
 Buku Teks
Rumble, J. R.
Database systems in science and engineering / J. R. Rumble and F. J. Smith
Adam Hilger, 1990
 Buku Teks