Gaya APA

Cunningham, W, P., Saigo, B, W. (2001). Environmental Science : A Global Concern : Sixth Edition (Sixth Edition). Amerika Serikat: McGraw - Hill.

Gaya MLA

Cunningham, William, P.., Saigo, Barbara, Woodworth. "Environmental Science : A Global Concern : Sixth Edition". Sixth Edition Amerika Serikat: McGraw - Hill, 2001. Text.