APA (7th ed.) Citation

(1976). De Croo, Herman. . Humblet, Antoine.

Chicago Style (17th ed.) Citation

De Croo, Herman. . Humblet, Antoine. 1976.

MLA (8th ed.) Citation

De Croo, Herman. . Humblet, Antoine. 1976.

Warning: These citations may not always be 100% accurate.