Cita APA (7th ed.)

Cromley, R. G. (1992). Digital cartography. Prentice Hall.

Cita Chicago (17th ed.)

Cromley, Robert G. Digital Cartography. Englewood Cliffs: Prentice Hall, 1992.

Cita MLA (9th ed.)

Cromley, Robert G. Digital Cartography. Prentice Hall, 1992.