C B Richey. (1961). Agricultural engineers' handbook. Philippines: Phoenix Press, Inc.
Chicago Style aipamenaC B Richey. Agricultural Engineers' Handbook. Philippines: Phoenix Press, Inc, 1961.
MLA aipamenaC B Richey. Agricultural Engineers' Handbook. Philippines: Phoenix Press, Inc, 1961.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.