Gaya APA

Haugen, C. et al (1990). Multipurpose tree species research for small farms : strategies and methods.Proceedings of an International conference held Nopember 20-23 .1989 in Jakarta Indonesia . Canada: Internatiomnal Development Research Centre of Canada.

Gaya MLA

Haugen, Christine. et al. "Multipurpose tree species research for small farms : strategies and methods.Proceedings of an International conference held Nopember 20-23 .1989 in Jakarta Indonesia". Canada: Internatiomnal Development Research Centre of Canada, 1990. Text.