Philippines (Republic) Department of Agriculture and Natural Resources & Agricultural Information Division. (1957). Manual for agricultural information workers. Agricultural Information Division, Department of Agriculture & Natural Resourcess.
Lua i Stíl Chicago (17ú heag.)Philippines (Republic) Department of Agriculture and Natural Resources agus Agricultural Information Division. Manual for Agricultural Information Workers. Manila: Agricultural Information Division, Department of Agriculture & Natural Resourcess, 1957.
Lua MLA (9ú heag.)Philippines (Republic) Department of Agriculture and Natural Resources agus Agricultural Information Division. Manual for Agricultural Information Workers. Agricultural Information Division, Department of Agriculture & Natural Resourcess, 1957.