APA استشهاد

Davies, P. (1995). About time: Einstein's unfinished revolution. Penguin Books.

استشهاد بنمط شيكاغو

Davies, Paul. About Time: Einstein's Unfinished Revolution. London: Penguin Books, 1995.

MLA استشهاد

Davies, Paul. About Time: Einstein's Unfinished Revolution. Penguin Books, 1995.