Walton, P. (1997). Snakes and ladders: Depicting evolution: Conceptions and preconceptions. Zenodo.
Citazione stile Chigago Style (17a edizione)Walton, Paul. Snakes and Ladders: Depicting Evolution: Conceptions and Preconceptions. Zenodo, 1997.
Citatione MLA (9a ed.)Walton, Paul. Snakes and Ladders: Depicting Evolution: Conceptions and Preconceptions. Zenodo, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.