APA (7e ed.) Bronvermelding

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.

Chicago (17e ed.) Bronvermelding

Johnston, Harry, en 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.

MLA (8e ed.) Bronvermelding

Johnston, Harry, en Leslie Haden Haden-Guest. The World of To-day: The Marvels of Nature and the Creations of Man. G.P. Putnam's Sons, 1924.