APA-viite

Richards, E. M. (1993). Commercialization of non-timber forest products in Amazonia.

Chicago-tyylinen lähdeviittaus

Richards, E M. Commercialization of Non-timber Forest Products in Amazonia. U K, National Research Institute, 1993.

MLA-viite

Richards, E M. Commercialization of Non-timber Forest Products in Amazonia. 1993.