APA

Nicholson B., Harrison S. G., Wallis M. & Masefield G. B. (1969). The Oxford book of food plants. London: Oxford University Press.

Chicago

Nicholson Barbara, Harrison Sydney Gerald, Wallis Michael and Masefield G B. 1969. The Oxford book of food plants. London: Oxford University Press.

Harvard

Nicholson B., Harrison S. G., Wallis M. and Masefield G. B. (1969). The Oxford book of food plants. London: Oxford University Press.

MLA

Nicholson Barbara, Harrison Sydney Gerald, Wallis Michael and Masefield G B. The Oxford book of food plants. London: Oxford University Press. 1969.