APA সাইটেশন

Crossfield. (1977). How to develop executive skills. Crossfield.

শিকাগো স্টাইলে সাইটেশন

Crossfield. How to Develop Executive Skills. New Delhi: Crossfield, 1977.

এমএলএ সাইটেশন

Crossfield. How to Develop Executive Skills. Crossfield, 1977.