- Babirusa and Pig (Monk)
- Babirusa and Pig (Indian Hog, Variety of Common Hog). In Thomas Pennant, Synopsis of quadrupeds, Chester: John Monk (printer), 1771 (Washington, DC, Smithsonian Libraries), Pl. XI ◼
- Babirusa and Pig (Indian Hog, Variety of Common Hog). In Thomas Pennant, History of quadrupeds, vol. 1, London: 1781, Pl. XIV ◼