Gaya APA

Cunningham, W, P., Woodworth, I, C, M, A, I, S, B. (2003). Environmental science: a global concern . New York: .

Gaya MLA

Cunningham, William, P., Woodworth, I., Cunningham,, Mary, Ann, II., Saigo,, Barbara. "Environmental science: a global concern". New York: , 2003. Text.