PARKINSON S.E. (1993). FIRST YEAR ENGG. DRAWING. WHEELER.
Lua i Stíl Chicago (17ú heag.)PARKINSON S.E. FIRST YEAR ENGG. DRAWING. NEW DELHI: WHEELER, 1993.
Lua MLA (9ú heag.)PARKINSON S.E. FIRST YEAR ENGG. DRAWING. WHEELER, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.