APA
Neurath M., Lauwerys J., . (1951). How the world was explored. : .
Chicago
Neurath Marie, Lauwerys Ja, . 1951. How the world was explored. : .
Harvard
Neurath M., Lauwerys J., . (1951). How the world was explored. : .
MLA
Neurath Marie, Lauwerys Ja, . How the world was explored. : . 1951.
