APA

Cooper J. C., . (1981). the joy of the plain life. usa: impact books.

Chicago

Cooper John Charles, . 1981. the joy of the plain life. usa: impact books.

Harvard

Cooper J. C., . (1981). the joy of the plain life. usa: impact books.

MLA

Cooper John Charles, . the joy of the plain life. usa: impact books. 1981.