Carpio, R. C., & Encarnacion, A. M. (1981). Effective speaking. Rex Book Store.
Lua i Stíl Chicago (17ú heag.)Carpio, Rustica C., agus Anacleta M. Encarnacion. Effective Speaking. Manila: Rex Book Store, 1981.
Lua MLA (9ú heag.)Carpio, Rustica C., agus Anacleta M. Encarnacion. Effective Speaking. Rex Book Store, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.