Gaya APA

Cunningham, W, P., Saigo, B, W. (2001). Environmental science: A global concern 6th edition . Boston: McGraw-Hill Book.

Gaya MLA

Cunningham, William, P.., Saigo, Barbara, Woodworth. "Environmental science: A global concern 6th edition". Boston: McGraw-Hill Book, 2001. Printed Book.