Leigh, R. A., & Johnston, A. E. (1994). Long-term experiments in agricultural and ecological sciences: Proceedings of a conference to celebrate the 150th anniversary of Rothamsted Experimental Station, held at Rothamsted, 14-17 July 1993. CAB International.
Chicago Style (17. basım) AtıfLeigh, R. A., ve A. E. Johnston. Long-term Experiments in Agricultural and Ecological Sciences: Proceedings of a Conference to Celebrate the 150th Anniversary of Rothamsted Experimental Station, Held at Rothamsted, 14-17 July 1993. Wallingford: CAB International, 1994.
MLA (9th ed.) AtıfLeigh, R. A., ve A. E. Johnston. Long-term Experiments in Agricultural and Ecological Sciences: Proceedings of a Conference to Celebrate the 150th Anniversary of Rothamsted Experimental Station, Held at Rothamsted, 14-17 July 1993. CAB International, 1994.