Tham khảo Yashica

  1. 1 2 Heiberg, Milton, The Yashica Guide, A Modern Camera Guide Series Book, New York: Amphoto Press, ISBN 0-8174-2151-3, p. 10
  2. 1 2
  3. 1 2 Heiberg, p. 10
  4. ↑ Condax, Phillip, The Evolution Of The Japanese Camera, Rochester, NY: International Museum of Photography (1984), ISBN 978-0-935398-11-3