APA استشهاد

Christie,Agatha. (1997). While the light lasts. Harper Collins Publishers.

استشهاد بنمط شيكاغو

Christie,Agatha. While the Light Lasts. LONDON: Harper Collins Publishers, 1997.

MLA استشهاد

Christie,Agatha. While the Light Lasts. Harper Collins Publishers, 1997.