Hartman, R. R. (1976). Graphics For Designers A Studio Workbook Robert R. Hartmann. The IOWA State University.
Lua i Stíl Chicago (17ú heag.)Hartman, Robert R. Graphics For Designers A Studio Workbook Robert R. Hartmann. The IOWA State University, 1976.
Lua MLA (8ú heag.)Hartman, Robert R. Graphics For Designers A Studio Workbook Robert R. Hartmann. The IOWA State University, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.