Petkov, V. (2005). Relativity and the nature of spacetime. Springer-Verlag.
芝加哥风格引文Petkov, Vesselin. Relativity and the Nature of Spacetime. Berlin, Heidelberg: Springer-Verlag, 2005.
MLA引文Petkov, Vesselin. Relativity and the Nature of Spacetime. Springer-Verlag, 2005.
警告：这些引文格式不一定是100％准确.