APA (7th ed.) Zitazioa
Hartmann, M., & Hesse, J. W. (2014). Agriculture and food in the 21st century: Economic, environmental and social challenges : festschrift on the occasion of Prof. Dr. Dr. h. c. Michael Schmitz 65. birthday. PL Academic Research.
Chicago Style (17th ed.) Zitazioa
Hartmann, Monika, eta Joachim W. Hesse. Agriculture and Food in the 21st Century: Economic, Environmental and Social Challenges : Festschrift on the Occasion of Prof. Dr. Dr. H. C. Michael Schmitz 65. Birthday. Frankfurt am Main, [Germany]: PL Academic Research, 2014.
MLA (9th ed.) Zitazioa
Hartmann, Monika, eta Joachim W. Hesse. Agriculture and Food in the 21st Century: Economic, Environmental and Social Challenges : Festschrift on the Occasion of Prof. Dr. Dr. H. C. Michael Schmitz 65. Birthday. PL Academic Research, 2014.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.