APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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