Wortman, S. (1975). The world food situation: A new initiative : prepared for the Subcommittee on Science, Research and Technology and the Subcommittee on Domestic and International Scientific Planning and Analysis, U.S. House of Representatives, September 23, 1975. [New York]: Rockefeller Foundation.
Чикагска система за цитиранеWortman, Sterling. The World Food Situation: A New Initiative : Prepared for the Subcommittee On Science, Research and Technology and the Subcommittee On Domestic and International Scientific Planning and Analysis, U.S. House of Representatives, September 23, 1975. [New York]: Rockefeller Foundation, 1975.
MLA формат за цитиранеWortman, Sterling. The World Food Situation: A New Initiative : Prepared for the Subcommittee On Science, Research and Technology and the Subcommittee On Domestic and International Scientific Planning and Analysis, U.S. House of Representatives, September 23, 1975. [New York]: Rockefeller Foundation, 1975.