Dyfyniad APA
ebrary, Inc, Fisher, P. F., & Unwin, D. (2002). Virtual reality in geography. Taylor & Francis.
Dyfyniad Arddull Chicago
ebrary, Inc, Peter F. Fisher, and D. Unwin. Virtual Reality in Geography. London: Taylor & Francis, 2002.
Dyfyniad MLA
ebrary, Inc, et al. Virtual Reality in Geography. Taylor & Francis, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.