Chú thích Lỗ_thở

  1. ↑ Entry "spiracle" in Merriam-Webster Online Dictionary.
  2. ↑ OED 2nd edition, 1989 as /'spaɪərək(ə)l/.
  3. ↑ Romer, Alfred Sherwood; Parsons, Thomas S. (1977). The Vertebrate Body. Philadelphia, PA: Holt-Saunders International. tr. 316–327. ISBN 0-03-910284-X.
  4. ↑ Romer, A.S. (1949): The Vertebrate Body. W.B. Saunders, Philadelphia. (2nd ed. 1955; 3rd ed. 1962; 4th ed. 1970)
  5. ↑ Solomon, Eldra, Linda Berg, Diana Martin (2002): Biology. Brooks/Cole.