Blalock, H. M., & Blalock, A. B. (1968). Methodology in social research. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Blalock, Hubert M., agus Ann B. Blalock. Methodology in Social Research. New York: McGraw-Hill, 1968.
Lua MLA (9ú heag.)Blalock, Hubert M., agus Ann B. Blalock. Methodology in Social Research. McGraw-Hill, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.