APA-viite

David D Wooldridge. (1990). Manual on land use survey and capability classification for upland watersheds. Philippines: Asean-US watershed Project.

Chicago-tyylinen lähdeviittaus

David D Wooldridge. Manual On Land Use Survey and Capability Classification for Upland Watersheds. Philippines: Asean-US watershed Project, 1990.

MLA-viite

David D Wooldridge. Manual On Land Use Survey and Capability Classification for Upland Watersheds. Philippines: Asean-US watershed Project, 1990.

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