Hradilek, L. (1984). Three-dimensional terrestrial triangulation: Applications in surveying engineering. Konrad Wittwer.
Chicago-referens (17:e uppl.)Hradilek, Ludvik. Three-dimensional Terrestrial Triangulation: Applications in Surveying Engineering. Stuttgart: Konrad Wittwer, 1984.
MLA-referens (9:e uppl.)Hradilek, Ludvik. Three-dimensional Terrestrial Triangulation: Applications in Surveying Engineering. Konrad Wittwer, 1984.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.