Παραπομπή APA

Meena Singh and Singh, O. P. (2005). Art of effective english writing.

Παραπομπή Chicago Style

Meena Singh and Singh, O P. Art of Effective English Writing. S Chand & Co. Ltd., New Delhi, 2005.

Παραπομπή MLA

Meena Singh and Singh, O P. Art of Effective English Writing. 2005.