Johnston, H., & Haden-Guest, L. H. (1924). The world of to-day: The marvels of nature and the creations of man. G.P. Putnam's Sons.
Dyfyniad Arddull ChicagoJohnston, Harry, and Leslie Haden Haden-Guest. The World of To-day: The Marvels of Nature and the Creations of Man. New York ; London: G.P. Putnam's Sons, 1924.
Dyfyniad MLAJohnston, Harry, and Leslie Haden Haden-Guest. The World of To-day: The Marvels of Nature and the Creations of Man. G.P. Putnam's Sons, 1924.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.