Bartley, D. C. (1907). Adulteration of food: Statutes and cases dealing with coffee, tea, bread, seeds, food and drugs, margarine, milk-blended butter, fertilisers and feeding stuffs, &c, &c (3d ed.). Stevens and Sons, limited.

Bartley, Douglas Cole. Adulteration of Food: Statutes and Cases Dealing with Coffee, Tea, Bread, Seeds, Food and Drugs, Margarine, Milk-blended Butter, Fertilisers and Feeding Stuffs, &c, &c. 3d ed. London: Stevens and Sons, limited, 1907.

Bartley, Douglas Cole. Adulteration of Food: Statutes and Cases Dealing with Coffee, Tea, Bread, Seeds, Food and Drugs, Margarine, Milk-blended Butter, Fertilisers and Feeding Stuffs, &c, &c. 3d ed. Stevens and Sons, limited, 1907.