Blalock, H. M. (1979). Social statistics (Rev. 2d ed.). National Book Store McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Blalock, Hubert M. Social Statistics. Rev. 2d ed. Manila, New York: National Book Store McGraw-Hill, 1979.
Lua MLA (9ú heag.)Blalock, Hubert M. Social Statistics. Rev. 2d ed. National Book Store McGraw-Hill, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.