Cita APA

United States. (1991). Selected environmental law statutes (1991-92 educational ed.). West Pub. Co.

Citación estilo Chicago

United States. Selected Environmental Law Statutes. 1991-92 educational ed. St. Paul, Minn: West Pub. Co, 1991.

Cita MLA

United States. Selected Environmental Law Statutes. 1991-92 educational ed. West Pub. Co, 1991.