Gaya APA

CUNNINGHAM, W, P, C, M, A, (, A. (2005). Environmental science; A global concern . : Mc Graw Hill Higher Education.

Gaya MLA

CUNNINGHAM, William, P;, CUNNINGHAM,, Mary, Ann, (et, Al). "Environmental science; A global concern". : Mc Graw Hill Higher Education, 2005. Buku.