Cita APA (7a ed.)

Sporrong, U. (1990). Maps and Mapping. SNA Publishing.

Cita Chicago Style (17a ed.)

Sporrong, Ulf. Maps and Mapping. Stockholm: SNA Publishing, 1990.

Cita MLA (9a ed.)

Sporrong, Ulf. Maps and Mapping. SNA Publishing, 1990.