APA استشهاد

Singer, I. M., & Thorpe, J. A. (1967). Lecture notes on elementary topology and geometry. Springer.

استشهاد بنمط شيكاغو

Singer, I. M., و John A. Thorpe. Lecture Notes on Elementary Topology and Geometry. New York: Springer, 1967.

MLA استشهاد

Singer, I. M., و John A. Thorpe. Lecture Notes on Elementary Topology and Geometry. Springer, 1967.