อ้างอิง ของ สนูปี้

  1. ↑ Charles M. Schulz. Around the world in 45 years: Charlie Brown's anniversary celebration. Andrews McMeel Publishing, 1994. p. 11. ISBN 9780836217667
  2. ↑ "Snoopy, Charlie Brown et les autres. L'album de famille de Schulz. ISBN 978-27-3242-681-5
  3. ↑ Groth, Gary (December 1997). "Charles Schulz at 3 o'clock in the morning". The Comics Journal: 27 (flip).