Ikeda, D., & Inoue, Y. (1980). Letters of four seasons. Kodansha.
Lua i Stíl Chicago (17ú heag.)Ikeda, Daisaku, agus Yasushi Inoue. Letters of Four Seasons. Tokio: Kodansha, 1980.
Lua MLA (9ú heag.)Ikeda, Daisaku, agus Yasushi Inoue. Letters of Four Seasons. Kodansha, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.