APA (7 ম সংস্করণ) উদ্ধৃতি

Nagel, T. S., & Richman, P. T. (1972). Competency-based instruction: A strategy to eliminate failure; a branching programmed text. C.E. Merrill Pub.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Nagel, Thomas S., এবং Paul T. Richman. Competency-based Instruction: A Strategy to Eliminate Failure; a Branching Programmed Text. Columbus, Ohio: C.E. Merrill Pub, 1972.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Nagel, Thomas S., এবং Paul T. Richman. Competency-based Instruction: A Strategy to Eliminate Failure; a Branching Programmed Text. C.E. Merrill Pub, 1972.