APA
Briggs D. J., Courtney F. M. a., . (1993). Agriculture and environment. Harlow: Longman.
Chicago
Briggs David J, Courtney Frank M.jt author, . 1993. Agriculture and environment. Harlow: Longman.
Harvard
Briggs D. J., Courtney F. M. a., . (1993). Agriculture and environment. Harlow: Longman.
MLA
Briggs David J, Courtney Frank M.jt author, . Agriculture and environment. Harlow: Longman. 1993.