APA استشهاد

Held, A. (1980). General relativity and Gravitation: One hundred years after the birth of Albert Einstein. Plenum Press.

استشهاد بنمط شيكاغو

Held, A. General Relativity and Gravitation: One Hundred Years After the Birth of Albert Einstein. New York: Plenum Press, 1980.

MLA استشهاد

Held, A. General Relativity and Gravitation: One Hundred Years After the Birth of Albert Einstein. Plenum Press, 1980.