Woolbert, C. H. (1934). Fundamentals of Speech: A textbook of delivery (tercera edición.). Harper & Brothers Publishers.
Lua i Stíl Chicago (17ú heag.)Woolbert, Charles Henry. Fundamentals of Speech: A Textbook of Delivery. tercera edición. New York: Harper & Brothers Publishers, 1934.
Lua MLA (9ú heag.)Woolbert, Charles Henry. Fundamentals of Speech: A Textbook of Delivery. tercera edición. Harper & Brothers Publishers, 1934.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.