APA
Spedding C. R. W. e., . (1981). Vegetable productivity. London: Macmillan.
Chicago
Spedding C R W ed, . 1981. Vegetable productivity. London: Macmillan.
Harvard
Spedding C. R. W. e., . (1981). Vegetable productivity. London: Macmillan.
MLA
Spedding C R W ed, . Vegetable productivity. London: Macmillan. 1981.