Gaya APA

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

Gaya MLA

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