international annual conference )cairo & the arab fertilizer association. (2003). proccedings of 9th international annual conference 28-30th january 2003-cairo. the arab fertilizer association.
Chicago (17e ed.) Bronvermeldinginternational annual conference )cairo en the arab fertilizer association. Proccedings of 9th International Annual Conference 28-30th January 2003-cairo. cairo: the arab fertilizer association, 2003.
MLA (9e ed.) Bronvermeldinginternational annual conference )cairo en the arab fertilizer association. Proccedings of 9th International Annual Conference 28-30th January 2003-cairo. the arab fertilizer association, 2003.
Let op: Deze citaties zijn niet altijd 100% accuraat.