Lal, D. (1978). Man or machines: A study of labor capital substitution in road construction in the Philippines. International Labour Office.
Lua i Stíl Chicago (17ú heag.)Lal, Deepak. Man or Machines: A Study of Labor Capital Substitution in Road Construction in the Philippines. Geneva: International Labour Office, 1978.
Lua MLA (9ú heag.)Lal, Deepak. Man or Machines: A Study of Labor Capital Substitution in Road Construction in the Philippines. International Labour Office, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.