University of California. (1978). Plant growth regulators: Study guide for agricultural pest control advisors. University of California.
Chicago Style (17th ed.) ZitazioaUniversity of California. Plant Growth Regulators: Study Guide for Agricultural Pest Control Advisors. Berkeley: University of California, 1978.
MLA (9th ed.) ZitazioaUniversity of California. Plant Growth Regulators: Study Guide for Agricultural Pest Control Advisors. University of California, 1978.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.