WHITEHEAD, A. (1962). PLANNING, ESTIMATING & RATE FIXING. PITMAN & CO.
Lua i Stíl Chicago (17ú heag.)WHITEHEAD, A. PLANNING, ESTIMATING & RATE FIXING. LONDON: PITMAN & CO, 1962.
Lua MLA (9ú heag.)WHITEHEAD, A. PLANNING, ESTIMATING & RATE FIXING. PITMAN & CO, 1962.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.