APA (7 ম সংস্করণ) উদ্ধৃতি

Clapp, F. L., & Huebner, B. P. (1924). The number combinations, their relative difficulty and the frequency of their appearance in text-books.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Clapp, Frank L., এবং Bernard P. Huebner. The Number Combinations, Their Relative Difficulty and the Frequency of Their Appearance in Text-books. Madison, Wis, 1924.

M.L.A (8 ম সংস্করণ) উদ্ধৃতি

Clapp, Frank L., এবং Bernard P. Huebner. The Number Combinations, Their Relative Difficulty and the Frequency of Their Appearance in Text-books. 1924.