ROBINSON, A., & Sale, R.. (1978). Elements of Cartography (4th.). John Wiley & sons, Inc..
Cita Chicago (17th ed.)ROBINSON, ARTHUR, i Randall Sale. Elements of Cartography. 4th. CANADA: John Wiley & sons, Inc., 1978.
Cita MLA (9th ed.)ROBINSON, ARTHUR, i Randall Sale. Elements of Cartography. 4th. John Wiley & sons, Inc., 1978.
Atenció: Aquestes cites poden no estar 100% correctes.