Reuter, P. MacCoun R. Weighing the harms of cannabis use and production. In: Proceedingsinternational psychosis conference. Melbourne: Australia, Department of Human Studies 1999.

Answer:

Reuter, P. and MacCoun R. "Weighing the Harms of Cannabis Use and Production." Proceedings International Psychosis Conference. Melbourne: Department of Human Studies, 1999.


Commentary:

Firstly, include an "and" between the names of both authors.

Secondly, The addition of "Australia" after Melbourne is probably not necessary. A comma should separate the publisher "Department of Human Studies" and the year of publication.