Kleppner, O., & Govoni, N. A. P. (1980). Advertising procedure (7th ed.). Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Kleppner, Otto, agus Norman A. P. Govoni. Advertising Procedure. 7th ed. Englewood Cliffs, N.J: Prentice-Hall, 1980.
Lua MLA (9ú heag.)Kleppner, Otto, agus Norman A. P. Govoni. Advertising Procedure. 7th ed. Prentice-Hall, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.