Hart, G., & Dolbear, C. Linke data: A geographic perspective.
Cita Chicago (17th ed.)Hart, Glen, i Catherine Dolbear. Linke Data: A Geographic Perspective.
Cita MLA (8th ed.)Hart, Glen, i Catherine Dolbear. Linke Data: A Geographic Perspective.
Atenció: Aquestes cites poden no estar 100% correctes.