APA (7 ম সংস্করণ) উদ্ধৃতি

Ladd, G. T. (1914). What can I know?: An inquiry into truth, its nature, the means of its attainment, and its relations to the practical life. Longmans, Green.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Ladd, George Trumbull. What Can I Know?: An Inquiry into Truth, Its Nature, the Means of Its Attainment, and Its Relations to the Practical Life. New York: Longmans, Green, 1914.

M.L.A (8 ম সংস্করণ) উদ্ধৃতি

Ladd, George Trumbull. What Can I Know?: An Inquiry into Truth, Its Nature, the Means of Its Attainment, and Its Relations to the Practical Life. Longmans, Green, 1914.