Lartey, G. W. (1977). The fourth dimension: The argument against the theory of evolutionary stages of social development. University of Lund.
Lua i Stíl Chicago (17ú heag.)Lartey, George Wilhelm. The Fourth Dimension: The Argument Against the Theory of Evolutionary Stages of Social Development. [Lund]: University of Lund, 1977.
Lua MLA (8ú heag.)Lartey, George Wilhelm. The Fourth Dimension: The Argument Against the Theory of Evolutionary Stages of Social Development. University of Lund, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.