APA

Harrison S. G., Masefield G. B. & Wallis M. (1973). The Oxford books of food plants. London: Oxford University Press.

Chicago

Harrison S G, Masefield G B and Wallis Michael. 1973. The Oxford books of food plants. London: Oxford University Press.

Harvard

Harrison S. G., Masefield G. B. and Wallis M. (1973). The Oxford books of food plants. London: Oxford University Press.

MLA

Harrison S G, Masefield G B and Wallis Michael. The Oxford books of food plants. London: Oxford University Press. 1973.