Gaya APA

Environmental management systems : a guide for planning, development, and implementation / Jay G. Martin and Gerald J. Edgley. (1998). : Rockville, Md., Government Institute.

Gaya MLA

Environmental management systems : a guide for planning, development, and implementation / Jay G. Martin and Gerald J. Edgley. . : Rockville, Md., Government Institute, 1998. Text.