APA

The Earth Works Group, . (1990). The recycler's handbook. Berkeley: Earth Works Press.

Chicago

The Earth Works Group, . 1990. The recycler's handbook. Berkeley: Earth Works Press.

Harvard

The Earth Works Group, . (1990). The recycler's handbook. Berkeley: Earth Works Press.

MLA

The Earth Works Group, . The recycler's handbook. Berkeley: Earth Works Press. 1990.