एपीए उद्धरण

Holtz, R. (1988). Geosynthetics for Soil Improvment. American society of Civil Engineers.

शिकागो स्टाइल उद्धरण

Holtz, R.D. Geosynthetics for Soil Improvment. New York: American society of Civil Engineers, 1988.

एमएलए उद्धरण

Holtz, R.D. Geosynthetics for Soil Improvment. American society of Civil Engineers, 1988.