Παραπομπή APA

Watkins, D. E. Effective Speech: Including Public Speaking, Mental Training and the Development of Personality. Psychology Publishing Co. Ltd.

Παραπομπή Chicago Style

Watkins, Dwight E. Effective Speech: Including Public Speaking, Mental Training and the Development of Personality. Cheshire: Psychology Publishing Co. Ltd.

Παραπομπή MLA

Watkins, Dwight E. Effective Speech: Including Public Speaking, Mental Training and the Development of Personality. Psychology Publishing Co. Ltd.