^Theodora Lau and Laura Lau, Chapter 8: "The Sheep: The Eighth Sign of the Lunar Cycle", The Handbook of Chinese Horoscopes, pp. 193–220, Harper Collins, 1979 (paperback edition December 2010) ISBN978-0061990915
^A Lunar New Year With a Name That's a Matter of Opinion, Chris Buckley, New York Times, Feb. 18, 2015: "The reason is that the word for the eighth animal in the Chinese zodiac's 12-year cycle of creatures, yang in Mandarin, does not make the distinction found in English between goats and sheep and other members of the Caprinae subfamily. Without further qualifiers, yang might mean any such hoofed animal that eats grass and bleats."