APA
,, . (1994). Inventors environmental guide lines. London: Graham & Trotman.
Chicago
,, . 1994. Inventors environmental guide lines. London: Graham & Trotman.
Harvard
,, . (1994). Inventors environmental guide lines. London: Graham & Trotman.
MLA
,, . Inventors environmental guide lines. London: Graham & Trotman. 1994.