APA

Willig J. T., . (1994). Environmental TQM. New York: McGraw-Hill.

Chicago

Willig John T, . 1994. Environmental TQM. New York: McGraw-Hill.

Harvard

Willig J. T., . (1994). Environmental TQM. New York: McGraw-Hill.

MLA

Willig John T, . Environmental TQM. New York: McGraw-Hill. 1994.