Gaya APA

Longley, P, A., GOODCHILD, M, F. (2011). GEOGRAPHIC INFORMATION SYSTEMS & SCIENCE, THIRD EDITION (3). : .

Gaya MLA

Longley, Paul, A., GOODCHILD, MICHAEL, F.. "GEOGRAPHIC INFORMATION SYSTEMS & SCIENCE, THIRD EDITION". 3 : , 2011. Buku.