APA
Federation International Des Geometres, . (1986). XVIII International Congress of Surveyors June 1 to 11, 1986, Toronto, Canada. Papers: commission 5 survey instruments and methods. Ottawa: FIG.
Chicago
Federation International Des Geometres, . 1986. XVIII International Congress of Surveyors June 1 to 11, 1986, Toronto, Canada. Papers: commission 5 survey instruments and methods. Ottawa: FIG.
Harvard
Federation International Des Geometres, . (1986). XVIII International Congress of Surveyors June 1 to 11, 1986, Toronto, Canada. Papers: commission 5 survey instruments and methods. Ottawa: FIG.
MLA
Federation International Des Geometres, . XVIII International Congress of Surveyors June 1 to 11, 1986, Toronto, Canada. Papers: commission 5 survey instruments and methods. Ottawa: FIG. 1986.
