Gaya APA

Swanson, C, P., Spivak, M. (1979). Comprehensive introdution to differential geometry vloume I . Texas: Texas: Publish or Perish; 1979.

Gaya MLA

Swanson, Carl, P.., Spivak, Michael. "Comprehensive introdution to differential geometry vloume I". Texas: Texas: Publish or Perish; 1979, 1979. Text.