Cita APA

Marble, D. F., Calkins, H. W., & Peuquet, D. J. (1984). Basic readings in geographic information systems. SPAD Systems.

Citación estilo Chicago

Marble, Duane F., Hugh W. Calkins, and Donna J. Peuquet. Basic Readings in Geographic Information Systems. Williamsville, N.Y: SPAD Systems, 1984.

Cita MLA

Marble, Duane F., et al. Basic Readings in Geographic Information Systems. SPAD Systems, 1984.