Cita APA (7th ed.)

Harper, L. J., & Davis, . S. (1984). Food, nutrition and agriculture: Student workbook. FAO.

Cita Chicago (17th ed.)

Harper, Laura Jane, i Susan Davis. Food, Nutrition and Agriculture: Student Workbook. Rome: FAO, 1984.

Cita MLA (9th ed.)

Harper, Laura Jane, i Susan Davis. Food, Nutrition and Agriculture: Student Workbook. FAO, 1984.