APA (7th ed.) Citation

Parsons, D. H. (1960). The extension of Darboux's method. Gauthier-Villars.

Chicago Style (17th ed.) Citation

Parsons, D. H. The Extension of Darboux's Method. Paris: Gauthier-Villars, 1960.

MLA (9th ed.) Citation

Parsons, D. H. The Extension of Darboux's Method. Gauthier-Villars, 1960.