Klingenberg, W. (1978). Lectures on closed geodesics. Springer-Verlag.
芝加哥风格引文Klingenberg, Wilhelm. Lectures on Closed Geodesics. Berlin: Springer-Verlag, 1978.
MLA引文Klingenberg, Wilhelm. Lectures on Closed Geodesics. Springer-Verlag, 1978.
警告：这些引文格式不一定是100％准确.