APA
Hill M. P., Julien M. H. & Center T. D. (1999). Proceedings of the first IOBC global working group meeting for the biological and integrated control of water hyacinth 16-19 November 1998 St Lucia Park Hotel, Harare, Zimbabwe. Pretoria, South Africa: Plant Protection Research Institute.
Chicago
Hill Martin P, Julien Mic H and Center Ted D. 1999. Proceedings of the first IOBC global working group meeting for the biological and integrated control of water hyacinth 16-19 November 1998 St Lucia Park Hotel, Harare, Zimbabwe. Pretoria, South Africa: Plant Protection Research Institute.
Harvard
Hill M. P., Julien M. H. and Center T. D. (1999). Proceedings of the first IOBC global working group meeting for the biological and integrated control of water hyacinth 16-19 November 1998 St Lucia Park Hotel, Harare, Zimbabwe. Pretoria, South Africa: Plant Protection Research Institute.
MLA
Hill Martin P, Julien Mic H and Center Ted D. Proceedings of the first IOBC global working group meeting for the biological and integrated control of water hyacinth 16-19 November 1998 St Lucia Park Hotel, Harare, Zimbabwe. Pretoria, South Africa: Plant Protection Research Institute. 1999.