Cita APA (7a ed.)
Culture, agriculture, food and environment. John Wiley & Sons.
Cita Chicago Style (17a ed.)
Culture, Agriculture, Food and Environment. Hoboken, NJ: John Wiley & Sons.
Cita MLA (9a ed.)
Culture, Agriculture, Food and Environment. John Wiley & Sons.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.