Gaya APA
Agardy, F, J, &, N, N, L.
(2005).
Environmental solutions
.
Boston:
Elsevier Academic Pess.
Gaya MLA
Agardy, Franklin, J., &, Nemerow,, Nelson, Leonard.
"Environmental solutions".
Boston:
Elsevier Academic Pess,
2005.
Text.