APA استشهاد

Calvert, P. (1990). Revolution and couter-revolution. Open University.

استشهاد بنمط شيكاغو

Calvert, Peter. Revolution and Couter-revolution. Buckingham: Open University, 1990.

MLA استشهاد

Calvert, Peter. Revolution and Couter-revolution. Open University, 1990.