APA استشهاد

Stephen Marshak. (2019). Earth: Portrait of a Planet (Sixth.). W.W. Norton.

استشهاد بنمط شيكاغو

Stephen Marshak. Earth: Portrait of a Planet. Sixth. NewYork: W.W. Norton, 2019.

MLA استشهاد

Stephen Marshak. Earth: Portrait of a Planet. Sixth. W.W. Norton, 2019.