Cita APA (7a ed.)
Ross, N. P. The Epic of Man. Life.
Cita estilo Chicago (17a ed.)
Ross, Norman P. The Epic of Man. Nueva York, EUA: Life.
Cita MLA (9a ed.)
Ross, Norman P. The Epic of Man. Life.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.