APA

Dutton G., Harvard University, . (1978). Harvard papers on geographic information systems. Cambridge, Mass: .

Chicago

Dutton Geoffrey, Harvard University, . 1978. Harvard papers on geographic information systems. Cambridge, Mass: .

Harvard

Dutton G., Harvard University, . (1978). Harvard papers on geographic information systems. Cambridge, Mass: .

MLA

Dutton Geoffrey, Harvard University, . Harvard papers on geographic information systems. Cambridge, Mass: . 1978.