Cottrell, R. F. (1963). Inton bigat. Philippine Pub. House.
Lua i Stíl Chicago (17ú heag.)Cottrell, Roy Franklin. Inton Bigat. Manila: Philippine Pub. House, 1963.
Lua MLA (9ú heag.)Cottrell, Roy Franklin. Inton Bigat. Philippine Pub. House, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.