APA

Frederking R., . (1979). Laboratory tests on downdrag loads developed by floating ice covers on vertical piles. Ottawa: National Research Council Canada. Division of Building Research. DBR paper no 874.

Chicago

Frederking RMW, . 1979. Laboratory tests on downdrag loads developed by floating ice covers on vertical piles. Ottawa: National Research Council Canada. Division of Building Research. DBR paper no 874.

Harvard

Frederking R., . (1979). Laboratory tests on downdrag loads developed by floating ice covers on vertical piles. Ottawa: National Research Council Canada. Division of Building Research. DBR paper no 874.

MLA

Frederking RMW, . Laboratory tests on downdrag loads developed by floating ice covers on vertical piles. Ottawa: National Research Council Canada. Division of Building Research. DBR paper no 874. 1979.