(1968). Science for better living. Washington, D.C: United States Department of Agriculture.
Chicago Style aipamenaScience for Better Living. Washington, D.C: United States Department of Agriculture, 1968.
MLA aipamenaScience for Better Living. Washington, D.C: United States Department of Agriculture, 1968.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.