Gaya APA

Cunningham, W, P. (2004). (PASCA) Principles of Enviromental Science inquiry and Applications (Edisi 1). USA: Mc Graw-Hill International Book Company.

Gaya MLA

Cunningham, William, P.. "(PASCA) Principles of Enviromental Science inquiry and Applications". Edisi 1 USA: Mc Graw-Hill International Book Company, 2004. .