APA

Grad Frank P,, . (1992). Environmental law 1992 (supplement). Newyork: Mathew Bender.

Chicago

Grad Frank P,, . 1992. Environmental law 1992 (supplement). Newyork: Mathew Bender.

Harvard

Grad Frank P,, . (1992). Environmental law 1992 (supplement). Newyork: Mathew Bender.

MLA

Grad Frank P,, . Environmental law 1992 (supplement). Newyork: Mathew Bender. 1992.